1 . —How was that?
—I was chatting on line ______ the power went out.

A．because

B．while

C．as

D．when

2 . I’ve already told you that I’m going to buy it, ________.

A．how much does it cost	B．no matter how it costs
C．however does it cost much	D．however much it costs

3 . There is no doubt _______international cooperation is the key to dealing with cyber crime.

A．then

B．that

C．wheather

D．this

4 . We shouldn’t spend our money testing so many people, most of ________ are healthy.

A．that	B．which
C．what	D．whom

5 . -----Is this the first time you______ Chengdu?
-----No. But the first time I______ here, the city wasn’t so beautiful

A．visited; came	B．visited; have come
C．have visited ; have come	D．have visited; came

6 . ________snacks and drinks, but they also brought cards for entertainment when they had a picnic in the forest.

A．Not only they brought

B．Not only did they bring

C．Not only brought they

D．Not only they did bring

7 . The door opened and in_______.

A．he came

B．came he

C．did he come

D．did Mr Smith come

8 . It was        back home after the experiment.

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

9 . Here are two pairs of shoes, ______ you may choose.

A．both of them	B．either of them
C．any of which	D．either of which

10 . The weather turned out to be very good, _______was more than we could expect.

A．what	B．which
C．that	D．it