（ ）21.The continuous storm_____the harvesting of the wheat crop by two weeks.

A.set back

B.set of

C.set out

D.set aside

21.A【解析】set back“使推迟，耽误”；set off“动身”；set out“出发，启程”；set aside“留出，放到一旁”。句意：连续性暴雨使小麦收获的时间推迟了两周。故选A。

（ ）22.The famous magician，as well as his assistant，_____to perform at the China's Got Talent in 2017.

A.were invited

B.was invited

C.have been invited

D.has been invited

22.B【解析】根据时间状语in 2017可知，本句用一般过去时，故排除C、D。当主语后面接由as well as引导的名词时，谓语动词的单复数与主语一致， 所以本题的谓语动词要用单数形式。故选B。