He has a friend _______ father is a doctor.
| A．who | B．whom | C．whose | D．which |
We should protect the earth because it’s home to _______animals .
| A．million | B．millions |
| C．million of | D．millions of |
It is difficult me _______ English well. But I’ll study harder.
| A．to, learn | B．for, learning |
| C．for, to learn | D．to, to learn |
______ travel all over China during the summer holiday?
| A．Why not you | B．Why don’t you |
| C．What about | D．It is a good idea |
Please look at the word on the blackboard and ________.
| A．write it down | B．write down it |
| C．write them down | D．write down them |
Please take _____umbrella when you go out.
| A． an | B．the | C．a | D．\ |