问题

Mr Smith is always on time for everything How________ it be that he was late for the flight

A:it
B:who
C:that
D:which

正确答案是：

同类题型

_______ in doing his homework , he didn’t know I had walked in.

Listen! Is that Millie singing—No. It _____ be Millie. She has gone to Beijing.

（2012绵阳）Hurry up！If we miss________last bus，we’ll have to get home by________taxi．

More colleges next year for more students to get a good education.

Why do you always watch Channel 8 instead ofChannel 6, Grandpa -The program on Channel 8 are ______better .