There are about _______ students in their school now..
| A．hundred of | B．nine hundred | C．nine hundreds | D．nine hundreds of |
-----I am going to have a test next week.
-----__________!
| A．Enjoy yourself | B．Good luck |
| C．Have a nice trip | D．Well done |
There were _________ doctors, so Dr Norman Bethune had to work on his own.
| A．few | B．a few | C．little | D．a little |
My little brother caught a cold, ________ he didn’t wear warm clothes yesterday.
| A．so | B．because | C．but | D．and |
I couldn’t work out this problem ________ my teacher helped me.
| A．before | B．unless | C．because | D．until |
_________ my mother was washing clothes, my father was reading books.
| A．While | B．When | C．Before | D．After |