It is only when you lose something _____ how much you value it.
| A．then you will realize | B．do you realize |
| C．that you will realize | D．which you will realize |
—We were not sure which way to go. In the end we chose to turn right.
—You _______ the wrong way. You _______ left.
| A．had gone; must have turned | B．went; must have turned |
| C．had gone; should have turned | D．went; should have turned |
—Does Mr. Smith live next door to you?
—No, but he _______.
| A．is used to | B．used to | C．used | D．used to be |
______ for a long time, but he managed to catch up with his classmates at last.
| A．Having been ill | B．Being ill | C．He was ill | D．Though ill |
I had just finished all my homework and was about to go to bed the phone rang.
| A．when | B．until | C．while | D．before |
--- How is Dennis getting along with his work?
--- Well, he could always _______ a new idea for increasing sales.
| A．come up with | B．come about | C．come on | D．come over |