題目列表(包括答案和解析)
______ at the door before entering please.
A.Knocked | B.Knock | C.Knocking | D.To knock |
______ at the door before entering please.
A.Knocked B.Knock C.Knocking D.To knock
_____ at the door before entering please.
A. Knocked B. To knock C. Knocking D. Knock
A.Knocked
B.To knock
C.Knocking
D.Knock
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