问题

I don’t doubt _ he took the first place in his class; but I do doubt _ he will succeed in the end.[ ]

A:if; that
B: but; which
C: whether; whether
D: that; whether

正确答案是：

同类题型

I want to relax myself right now. Would you pleasechange to _____ music

They were all very tired,but ________of them took atest.A．everybody

．____ tomorrow, I will pay a visit to my grandparents．

You see, the arrow on the wallthe way to the parking lot.

Mary wants to know_____________________.