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!
a few minutes later, i ____at the door and an old man_____it.
a few minutes later, i ____at the door and an old man_____it.
A.knocks ;openingB.knocked ;opened
C.knock ;openD.knocking ;opening
A.knocks ;openingB.knocked ;opened
C.knock ;openD.knocking ;opening
英语人气:524 ℃时间:2019-10-29 22:31:52
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