When you are tired，________ in the countryside is a wonderful experience．（ ）
A．relaxingB．relaxedC．relaxD．relaxes
How many women doctors are there in your hospital?
___________ them _________over thirty．（ ）
| A． |
A number of；are |
B． |
The number of；are |
| C． |
The number of；is |
D． |
A number of；is |
He can take the book away as long as he_________ it．（ ）
| A． |
like |
B． |
likes |
C． |
liking |
D． |
liked |
He ____ be in the restaurant．His car is just outside it!（ ）
| A． |
can |
B． |
can't |
C． |
must |
D． |
mustn't |
What do you want to be in the future，Nick？
I want to be__________ pilot．It is________ exciting job．（ ）
| A． |
a；a |
B． |
a；an |
C． |
the；an |
D． |
a；the |
There are so many foggy days recently．We all wonder_________．（ ）
A．how is the air polluted
B．why the air is seriously polluted
C．what can we do to prevent that bad weather
D．what are the real reasons