that smells so good? It makes my mouth water. A．What isB．Is that whatC．What is itD．Is it what——青夏教育精英家教网——

_____ that smells so good? It makes my mouth water.

B．Is that what

I wonder________there are so many natural disasters across the world in 2010.

A．which it is that	B．what is it that
C．how it is that	D．why it is that

---what causes your heart attack？
---It is_____

A．because of your overweight

B．your being overweight

C．because you are overweight

D．you are so overweight

It was not until I began to work that ______ how much time I had wasted.
A did I realize B didn’t I realize C I realize D I realized

It was when I arrived home _____ I realized I had left my bag in the library.

It was only with the help of the local guide________________.

A．was the mountain climber rescued

B．that the mountain climber was rescued

C．when the mountain climber was rescued

D．then the mountain climber was rescued

Where is it___________you picked up the wallet yesterday ?

It was ______ back home from the restaurant ________ he stayed for a whole day.

A．not until midnight did he go; which	B．until midnight when he didn’t go; there
C．not until midnight that he went; where	D．until midnight that he didn’t go; that

Was it at the school gate.if I may ask _________ you met your friends from your hometown?
A where B that C which D ones

.
It was ___ he came back from Africa that year ___ he met the girl he would like to marry.

C．not until; that

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