问题

His ability has never been in doubt—-the question is ___________ or not he is prepared to work hard

A:that
B:if
C:where
D:whether

正确答案是：

同类题型

Of all the stories, this one is ______________.

There is something wrong with this bill.Please all the items again.

.Early to bed and early to rise ______ a man healthy, happy and wise

The manager decided to give the job to _____he believed had a strong sense of duty .

Anna wants to get her clothes .