问题补充:
I insisted that the boy his hands before having supper.
A. washes
B. washed
C. had washed
D. (should) wash
答案:
A. washes
B. washed
C. had washed
(答案→)D. (should) wash
解析:考查动词insist坚持要求,后跟从句用(should )do ,j句意:我坚持要求这个男孩应该吃饭之前洗手。所以选D。
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