Câu hỏi:

17/06/2026 2,296

My brother usually asks me for help when he has difficulty to do his math homework.

A. asks 

B. when 

C. has 

D. to do

Đáp án chính xác

Trả lời:

verified Giải bởi Vietjack

Kiến th ức: D ạng của độ ng từ

Giải thích: Have difficulty (in ) V-ing: có khó khăn trong việ c gì

to do => doing

Tạm dịch: Anh tôi thường nhờ tôi giúp đỡ khi anh ấy gặp khó khăn trong việc làm bài tập môn Toán.

Đáp án: D

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