Cut up these apples and oranges and then .
| A．mix it up | B．mix up them | C．mix up it | D．mix them up |
-The flight to London wasbecause of the heavy snow.
| A．put up | B．put out | C．put off | D．put away |
-Little Tomhome for three days. His parents are very worried.
| A．left | B．has left | C．has gone away from | D．has been away from |
- In our school library, there____ a number of books on science and the number of them ______ growing larger and larger.
| A．is, are | B．has, are | C．have, is | D．are, is |
- Youeat the soup if you don’t like it.
| A．shouldn’t | B．mustn’t | C．can’t | D．needn’t |
--- What is our head teacher like, do you know?
--Oh, he is very kind, ________ he looks very serious.
| A．because | B．though | C．if | D．when |