She was walking to the library to borrow some books when she was seeing a robbery. A. waslking to B. the C. some D. was seeing

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Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following sentence.

She was walking to the library to borrow some books when she was seeing a robbery.

waslking to

the

some

was seeing

Giải thích

Đáp án D

Giải thích: cần dùng quá khứ đơn vì hành động này xen vào hành động khác – sửa thành: saw

Dịch: Cô đang đi bộ đến thư viện để mượn sách thì thấy một vụ cướp.