The big clean-up began ________ the typhoon passed away．

A．as soon as

B．since

C．until

D．though

If you want to get better mark in your studies, do exactly ________ the teacher says．

A．like

B．after

C．as

D．while

I have my computer repaired ________ I can work on it easily．

A．so that

B．although

C．because

D．since

These new computers can store ________ than those old ones．

A．much information

B．many informations

C．much more information

D．many more informations

The number of the users of computers ________ every year in China these years．

A．increase

B．decrease

C．increases

D．decreases

Listen, her voice ________ a bird．

A．seems like

B．looks like

C．tastes like

D．sounds like

It's not ________ for us to work out 100 maths problem in an hour．

A．difficult

B．important

C．interesting

D．easy

It's already 11∶30 p. m．It's time ________．

A．to bed

B．for go to sleep

C．to asleep

D．for bed

Remember ________ in the street．It's dangerous．

A．to run across

B．running across

C．not to run across

D．not running across

What do you mean ________ the electric fan?

A．by turning off

B．in turning on

C．by turn off

D．in turn on