Liu Ming is ________ 18-year-old student．He got a gold medal in the competition．

a

an

the

－I think it's going to be a problem．

－Yes, it could be．

－I wonder ________ we can do about it．

what

how

if

that

What do you think we should ________ improve our environment?

do

to

do for

do to

We should sort the waste before ________．

throw it away

throwing them away

we throw away it

throwing it away

He seemed ________ when he ________ the news．

surprised, told

surprised, was told

surprising, told

surprising, was told

Ninety ________ teachers and students plant ________ trees every year．

thousands; million of

thousand; millions of

thousands of; millions of

thousand; million

There are some dangerous fishes in the river, and they've warned us ________ in it．

not to swim

to not swim

swim not to

not swimming

When you ________ the street, you must look first．

across

go cross

cross

goes across

She feels ________ tired today．

bit of

a bit

a little of

a bit of

－________ bad weather it is!It's rainy for two weeks．

－Yes, but the radio says it's going to stop ________ tomorrow．

What, raining

What a, blowing

How, snowing

How a, fishing