问题
选择题
My son __________ his clock when I went to get a cup I __________ in his study.
A．was winding up; had left
B．would up; had forgotten
C．had wounded; left
D．was winding up; forgot
答案
答案：A
考查时态。句意：当我去拿我留在他的书房的茶杯时，我的儿子正在给他的钟表上发条。结合语境可知主句描述的是正在进行的动作，下文从句描述的是过去某时已经完成的动作，故选A、