Question

【題目】 I thought about ______ over and over in my head and finally worked out how to do it.

A. what I have to do

B. I had to do what

C. what I had to do

D. what I to do

Answer 1

【答案】C

【解析】

試題分析：句意：我在腦子里一次又一次的考慮我必須做什么，最后想出怎樣去做。這里是what引導的賓語從句，注意用陳述語序，短語have to do sth.表示不得不，必須做某事。據(jù)謂語動詞是過去時，賓語從句也應該用過去時態(tài)，故選C。