Look,Dave is running faster and faster.He is --to win.(10:10)

Look,Dave is running faster and faster.He is --to win.(10:10)
A.afraid B.sure C.certainly D.probably
英语人气:110 ℃时间:2020-02-03 23:17:19
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Look,Dave is running faster and faster.He is --to win.(10:10)
A.afraid B.sure C.certainly D.probably
答案:B
be sure to do sth 肯定做某事,务必/一定做某事.为什么不能选C或D?CD答案都是副词,不能作is的表语。
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