Câu hỏi:
22/07/2024 258Choose the best answer
I am not sure ............ food tablets might supply enough energy for astronauts or not.
A. what
B. why
C. how
D. if
Trả lời:
Ta nhận thấy ở cuối câu gián tiếp có cụm “or not” (có hay không) mang ý nghĩa nghi vấn nên câu trực tiếp phải là một câu hỏi nghi vấn Yes/ No
Cấu trúc: S+ asked + O + if / whether + S + V.
=>I am not sure if food tablets might supply enough energy for astronauts or not.
Tạm dịch: Tôi không chắc liệu viên nén thức ăn có thể cung cấp đủ năng lượng cho các phi hành gia hay không.
Đáp án cần chọn là: D
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