by It was such a boring speech that we began to yawn.
A. The speech was very boring that we began to yawn.
B. It was so a boring speech that we began to yawn.
C. The speech was too boring that we began to yawn.
D. The speech was so boring that we began to yawn.
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D là đáp án đúng
Lời giải:
Đáp án: D
Giải thích : mệnh đề trạng ngữ chỉ mục đích: be so adj that mệnh đề = such (a/an) adj N that mệnh đề
