Do you know how long it has been _________service ?
| A．on | B．at | C．in | D．for |
—Where are Jane and her parents?
—They _____ Japan.
| A．have been to | B．are away |
| C．have gone to | D．had been in |
-----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 |