The old couple have been married for 40 years and never once ___________ with each other．
| A．they had quarreled | B．they have quarreled |
| C．have they quarreled | D．had they quarreled |
_____ his letter, I decided to write to him again
| A．Receiving not | B．Not receiving |
| C．Having not receiving | D．Not having received |
This computer is of good quality. If it ___________ break down within the first year, we would repair it at our expense.
| A．would | B．could | C．should | D．might |
I was about to leave _____ the telephone rang.
| A．after | B．while | C．when | D．before |
Accustomed to _____ in the countryside, Mr. King found it hard to live in the city.
| A．live | B．living | C．having live | D．have lived |
--What are you going to do this weekend？
--I will go to visit my grandparents _____ I have time.
A. as far as B. as much as C. as long as D as many as