单选题
4.
It ______ John and Peter who helped me with my work the other day.
A、
were
B、
is
C、
had been
D、
was
【正确答案】
D
【答案解析】
那天是约翰和皮特帮我做功课的。it was who/that+完整句。这个是一个强调句的句型。这句的主语是John and Kate。Help是谓语动词，跟着主语一起变化。
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