500 Câu trắc nghiệm ngữ pháp Tiếng Anh có đáp án - Phần 14
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By the end of last summer, Alexander _______ his Ph.D

21/25

By the end of last summer, Alexander _______ his Ph.D.

received

had received

receive

are received

Giải thích

Chọn đáp án B

By the end of + mốc quá khứ, QKHT