After a heated discussion, we suggested the customer _______ the product back for repairs.
| A．to send | B．send | C．sends | D．sent |
The boys were playing football on the ground. Sandy didn’t want to ______ them.
| A．take part in | B．join |
| C．join in | D．attend |
Finding information on the Internet is easy. The ______ is how you can tell whether the information is useful or not.
| A．ability | B．competition |
| C．challenge | D．knowledge |
You’d better have your room ______. It’s ______.
| A．clean; in mess | B．clean; in a mess |
| C．cleaned; in mess | D．cleaned; a mess |
The condition prevents the blood from freely.
| A．circulating | B．spreading |
| C．flowing | D．circling |
— You have spoken to your mother in a rude manner.
— I admit I was wrong, but she read my diary without my permission.
| A．shouldn’t | B．mustn’t |
| C．needn’t | D．won’t |