单项选择
从a、b、c、d四个选项中，选出可以填入空白处的最佳答案。

1.a: how do you do? b: _____
a.how are you ?
b.how do you do ?
c.i'm fine. thank you.
d.not very well. i'm afraid.

2.a: you watch my stuff for me. b: _____
a.ok
b.for how much?
c.i won't watch you.
d.how much stuff?

3.a: what's up ? b: _____
a.the price is up .
b.the sun.
c.the lift is going up.
d.nothing.

4.my father makes me _____ housework every day.
a.to do
b.doing
c.do
d.must do

5. _____dangerous.
a.this stair is
b.these stairs are
c.stairs are
d.the stair is

6.he ______ down for a while and then left the house.
a.lied
b.lay
c.laid
d.lain

7.actually, information technology can ______ the gap between the poor and the rich.
a.bridge
b.break
c.link
d.ally

8.the company is trying every means to ______ the wholesale price of its products.
a.pull down
b.bring down
c.put down
d.set down

9.susan has ______ the elbows of her son's jacket with leather patches to make it more durable.
a.reinforced
b.sustained
c.steadied
d.confirmed