31．—What’s the matter with Christine?
—A letter from her parents in California________an attack of homesickness.
| A．took off | B．gave off | C．sent off | D．set off |
If you are not familiar ____ the topic, you may write something that is familiar ____ you.
| A．with; with | B．to; to |
| C．to; with | D．with; to |
We would rather die than ______ difficulty.
| A．give up to | B．give in to |
| C．give way to | D．give back to |
Go about your business your own way. Don’t _____what others think or say.
| A．care for | B．care about |
| C．care with | D．care of |
___________ to enter an ideal university, he worked harder than ever before.
| A．Determined | B．Determine |
| C．Determining | D．To determine |
No one tells us______, so we need your help.
| A．how we should do | B．what should we do |
| C．how to do it | D．what to do it |