The nurse _____ is looking after the old man is Tom's sister．（ ）
| A． |
which |
B． |
who |
C． |
what |
- Will you take part in the Summer Camp this vacation？
- ________ .I'm not sure.（ ）
| A． |
Certainly |
B． |
Good luck |
C． |
No problem |
D． |
It depends |
- Is that man your friend Tom？
- That man ________ be him，because he has gone to Canada.（ ）
| A． |
can't |
B． |
mustn't |
| C． |
needn't |
D． |
had better not |
- English is difficult ________ at the beginning.
- Yes，but if you keep ________ ，you can make progress.（ ）
| A． |
to be learned；trying |
B． |
to learn；trying |
| C． |
to be learned；to try |
D． |
to learn；to try |
Look!Julia as well as her sisters ________ a kite on the playground.（ ）
| A． |
fly |
B． |
flies |
C． |
is flying |
D． |
are flying |
- I am worrying about our final exam these days.
- There is nothing to worry about ________ you work hard.（ ）
| A． |
until |
B． |
so that |
C． |
as far as |
D． |
as long as |