問題詳情:
— you study for a math exam? — Yes.
A. Have; to B. Do; have to C. Do; have D. Have to; 不填
【回答】
B have to短語為動詞短語,因此變一般疑問句要用助動詞do (主語為you)。
知識點:一般疑問句
題型:選擇題