Charlie was a rich boy who had more toys than you could imagine. A time came when he was so used to all his toys __________ he began to want something different.
| A．as | B．which | C．that | D．when |
No matter how bright a talker you are, there are times when it is better ______ silent.
| A．remain | B．be remaining |
| C．to remain | D．having remained |
There is ______ in our office that when it is somebody’s birthday, they bring in a cake for us all to share.
| A．balance | B．tradition | C．concern | D．relationship |
Mr. Smith ______ a grammar book meant for senior high school students and will almost finish it.
| A．has been writing | B．has written |
| C．was writing | D．has been written |
—I’m just going to finish the work off first.
—Go on if you _______.
| A．can | B．may | C．must | D．shall |
The new stadium being built for the next Asian Games will be ______ the present one.
| A．three times as big as | B．as three times big as |
| C．as big as three times | D．as big three times as |