---I’ve got to go now.-Must you? I you could stay for dinner with us tonight.A. think

问题补充：

---I’ve got to go now. ---Must you? I you could stay for dinner with us tonight.

A. think

B. thought

C. have thought

D. am thinking

答案：

A. think

(答案→)B. thought

C. have thought

D. am thinking

解析：thought 表示为过去思考，故选B