-Each boy and each girl???? talking about optional courses.-Yes! And they each??
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—Each boy and each girl???? talking about optional courses（选修课）.
—Yes! And they each???? their favorite one!
A. is; has????????????? ????????????? ????????????? B. are; have????????????? ????????????? ????????????? C. is; have????????????? ????????????? ????????????? D. are; has
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【答案】
C
【解析】考查主谓一致。单数名词分别用each修饰，作并列主语是，谓语动词要用单数，排除B,D；they each作主语时，根据后面的their，可知指的是复数，所以第二空用复数形式。所以选C。