Today, we'll discuss a number of cases ________ parents have much difficulty in communicating with their children．

A．which

B．that

C．where

D．why

He always brings me a pretty gift ________ he comes to visit me．

A．by the time

B．sometimes

C．every time

D．at times

My father is clearly in ________ dilemma about how to handle ________ quarrel between us．

A．the; a

B．/; the

C．a; the

D．a;/

Your story is perfect; I've never heard ________ before．

A．the better one

B．the best one

C．a better one

D．a good one

I had just stepped out of the bathroom and was busily drying myself with a towel ________ I heard the steps．

A．while

B．when

C．since

D．after

Jack ________ for Microsoft for 10 years before he quitted, but now he is working for a mobile phone company．

A．has worked

B．was working

C．worked

D．would work

That company was willing to provide us with ________ what we need, which made us excited．

A．no more than

B．more than

C．other than

D．less than

________ I didn't eat beef, but now I can eat a plate of beef ________．

A．At a time, at one time

B．At times, at a time

C．At one time, at a time

D．At a time, at times

The construction of the two new railway lines ________ by now．

A．has completed

B．have completed

C．have been completed

D．has been completed

The job ________ he has been applying is given to another young man．

A．to which

B．at which

C．for which

D．on which