It’s believed that our moods are sometimes by colours. Many scientists are doing some research (研究) on this subject.
| A．influenced | B．chosen | C． required | D．explained |
My pet dog ____ five months ago. Its ____ made me very sad.
| A．died, die | B．died, death | C．death, dead | D．dead, die |
We can go hiking next week ____ it rains heavily.
| A．unless | B．if | C．though | D．because |
–Look at the woman, why does she look so tired?
--Because she has three babies to ____.
| A．take care | B．be careful | C．take care of | D．be careful of |
There are so many good books. I really don’t know ____ .
| A．to choose which one | B．choose which one |
| C．to which one choose | D．which one to choose |
Our English class is so ____ that all of us are _____ in it.
| A．interesting, interesting | B．interested, interested |
| C．interesting, interested | D．interested, interesting |