Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

There was a sharp drop in sales last year due to the Covid-19 pandemic.

It isn't necessary for you to type these letters.

Tom said to me: "If I were you, I would give up smoking."

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions.

Which of the following can be inferred from the passage?

Which of the following is NOT mentioned in the passage?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 20 to 26.

Travelling around Thailand in the 1990s, William Janssen was impressed with the basic rooftop solar heating systems that were on many homes, where energy from the sun was absorbed by a plate and then used to heat water for the home. Two decades later Janssen developed that basic idea he saw in south-east Asia into a portable device that uses the power from the sun to purify water.

The Desolenator operates as a mobile desalination unit that can take water from different places, such as the sea, rivers, boreholes, and rain, and purify it for human consumption. It is particularly valuable in regions where natural groundwater reserves have been polluted, or where seawater is the only water source available. Janssen saw that there was a need for a sustainable way to clean water for both the developing and the developed countries when he moved to the United Arab Emirates and saw large-scale water processing.

The Desolenator can produce 15 liters of drinking water per day, enough to sustain a family for cooking and drinking. Its main selling point is that unlike standard desalination techniques, it doesn't require a generated power supply; just sunlight. It measures 120 cm by 90 cm, and it's easy to transport, thanks to its two wheels. Water enters through a pipe and flows as a thin film between a sheet of double glazing and the surface of a solar panel, where it is heated by the sun. The warm water flows into a small boiler (heated by a solar-powered battery) where it is converted to steam. When the steam cools, it becomes distilled water. The device has a very simple filter to trap particles, and this can easily be shaken to remove them. A recent analysis found that at least two- thirds of the world's population lives with severe water scarcity for at least a month every year. Janssen says that by 2030 half of the world's population will be living with water stress - where the demand exceeds the supply over a certain period of time. It is really important that a sustainable solution is brought to the market that is able to help these people,' he says. 'Many countries don't have the money for desalination plants, which are very expensive to build. They don't have the money to operate them, they are very maintenance intensive, and they don't have the money to buy the diesel to run the desalination plants, so it is a really bad situation."

(Adapted from Cambridge English IELTS Academic 15 by Cambridge University Press)

At Tim's new house.

John: "What a lovely house you have."

Tim: “_________________”

I will call you back_________.

My husband gave me a(n)________ car as a birthday present last month.

She managed to keep her job_________ the manager threatened to sack her.

As soon as James started working, he realized that his decision had not been a good one.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

Mary and her husband often went out together every weekend.

The last time I saw my younger brother was five years ago.

“What did you do on your vacation last year?” Tung said to Ha.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

Students are forbidden to cheat during the exam. There is no exception whatsoever.