The old lady has two sons, and ________ are famous scientists．

A．both of them

B．both of whom

C．each of them

D．none of whom

Mr．Smith is always here to help me ________ I am in trouble．

A．every time

B．the next time

C．many times

D．all the time

Who would you rather have ________ with you?

A．to go

B．go

C．gone

D．going

I’ve made up my mind to do everything I can ________ my English．

A．improve

B．improving

C．improved

D．to improve

The result of the experiment was very good, ________ we hadn’t expected．

A．where

B．which

C．that

D．what

－What was the matter with you?

－Oh, nothing serious．I just didn’t feel ________ those strengers．

A．easily with

B．at ease with

C．at ease about

D．ease about

They seldom fail to hand in their exercises in time, ________?

A．do they

B．don’t they

C．will they

D．won’t they

The police searched the house ________ the thief had visited．

A．in which

B．where

C．that

D．there

The money ________ you were to buy dog food is gone．

A．with what

B．with which

C．with that

D．with it

________ is well- known to us all, Comrade Lei Feng was always ready to help us．

A．which

B．As

C．That

D．It