He met many problems ______ he was going over his lessons.
| A．before | B．as soon as | C．since | D．while |
--What about finding out ______ Alice is going to Wuxi?
--I’m afraid her friends have told her Wuxi has many places of great interest.
| A．where | B．that | C．why | D．how |
--Just a minute. I’ll go to get some apples for you.
--Thanks, but you ______ get too many. One is enough.
| A．can’t | B．needn’t | C．may not | D．mustn’t |
It is said that about ______of the books and magazines in the world______in English.
A. four-fifths;are written B fourth fives;are written
C, four fifth;were written D fourth fifths; were written
--What do you think of maths?
--My favorite. It’s ______ for me to study of all the subjects in school.
| A．more difficult | B．the most difficult |
| C．less difficult | D．the least difficult |