Many students in this school make ________ a rule to come to the evening classes even on Saturday.

A．this    B．that   C．it     D．them

Early in the day ________ the forecast ________ there would be a dust storm.

A．come; that       B．came; that

C．comes; that    D．came; what

Little ________ his wife though she was seriously ill.

A．he took care of　　 B．he takes care of

C．does he take care of D．did he take care of

Not until they moved into the apartment ________ a girl had been killed in it.

A．they did know      B．they know

C．didn’t they know   D．did they know

 — Why can’t I park my car here?

 —At no time ________ in this area.

A．is parking permitted     

B．parking is permitted

C．parking is it permitted  

D．does parking permit

She is the only one of the students in our class________ passed the exam this time.

 A．who hasn’t     B．who haven’t

 C．who didn’t   D．who doesn’t

________ is known to everybody，light travels faster than sound.

  A．It       B．As 

  C．Which    D．What

It was quite a serious accident，________caused by careless driving.

A．which I think was　

B．I think which was

C．which I think it was

D．I think which it was

We visited a factory________ makes bikes for children.

A．where      B．which

C．in which    D．at which

Our teacher is always busy preparing lessons until 11 o’clock at night，________ we students have gone to sleep.

A．that time     B．by which time

C．by that time   D．which time