Question

Please don’t stand up in class _____ you ______.

A．until ; are told to

B．when ; are told

C．after ; were told

D．before ; were told to

Answer 1

A

試題分析：句意：在課堂上請到允許你時再站立。Not···until直到……才，是一固定句型；主句使用一般現在時，故時間從句也用一般現在時。Tell sb to do sth告訴某人做某事，改為被動語態后不可丟掉不懂事標記to。所以選A。