_____ back problems， always bend your knees when you lift heavy objects.
| A．Avoiding | B．To avoid |
| C．Having avoided | D．To be avoiding |
You will succeed in the end you give up halfway.
| A．even if |
| B．as though |
| C．as long as |
| D．unless |
To improve your oral English, everyone in the class is supposed to ____actively in these discussions.
| A．participate |
| B．attend |
| C．enter |
| D．take |
we move the vase to the windowsill? Do you think it’ll look better?
| A．What if |
| B．Only if |
| C．If only |
| D．Even if |
It’s a good idea to adjust yourself the local tradition while you are present a wedding.
| A．to; on |
| B．for; at |
| C．with; in |
| D．to; at |
Quite a few people that disaster was sure to strike if a mirror was broken
| A．were used to believe |
| B．were used to believing |
| C．used to believe |
| D．used to believing |