Our teachers don't allow us ______ mobile phones in the school.
| A． |
to use |
| B． |
use |
| C． |
using |
What _________unusual school trip we had! I will never forget it．（ ）
A．aB．anC．theD．/
In America， Thanksgiving is a holiday _____________celebrates the love of family．（ ）
A．whoB．/C．that
We have to ______________the school trip because of the bad weather．（ ）
A．put offB．get offC．turn off
___________do people greet visitors？ Some shake hands． Some say "hello" or "hi"．Some kiss．（ ）
A．WhyB．WhatC．How
We will cause less pollution _____________we can find ways to reuse or recycle more rubbish．（ ）
A．unlessB．ifC．though