a few minutes later, i ____at the door and an old man_____it.A.knocks ;opening B.knocked ;openedC.knock ;open D.knocking ;opening
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a few minutes later, i ____at the door and an old man_____it.
A.knocks ;opening B.knocked ;opened
C.knock ;open D.knocking ;opening
答案:B
I 后跟谓语动词,排除 D,而 and 连接的并列句左右时态要保持一致,所以都用一般过去时 knocked,opened
不明白的再问哟,请及时采纳,多谢!
B
用一般过去式
B. knocked, opened
答案: B
a few minutes later= after a few minutes, 一般用于一般过去时态
所以,主语I 后接过去式作为谓语动词
B
B
B 依据句子的表述“几分钟之后”,可知是过去式。所以B是正解
C
选 b,解析 and 前后两个句子的时态一致(即谓语时态一致),故排除a,kocking和opening是现在分词故不能当作谓语,所以排除d项,在看b,d两项,一个是过去时,一个是现在时,所以我们就看时间状语从句,看到later,很显然是表示过去时,固选d
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