问题
选择题
Steve was busy clearing the cups and dishes from the table ________ others were playing.
A．until
B．if
C．since
D．while
答案
答案：D
D考察连词。While在…期间；后面要接延续性动词或者表示状态的动词。故D正确。Since意为自从，引导时间状语从句，从句使用一般过去时。If如果，until直到.
