Steve was busy clearing the cups and dishes from the table ________ others were playing.
A．untilB．if
C．sinceD．while
D
D考察連詞。While在…期間；后面要接延續(xù)性動(dòng)詞或者表示狀態(tài)的動(dòng)詞。故D正確。Since意為自從，引導(dǎo)時(shí)間狀語從句，從句使用一般過去時(shí)。If如果，until直到.
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