________ of the students at online schools are from China．

Three fourth

Third four

Five sixths

Six-seven

They want to know whether aliens are dangerous and ________ humans．

do harm for

do harm to

have harmful to

make harms to

Don’t you really know ________ with the broken TV?

how to dealing

how does

what deals

what to do

I agreed on her suggestion ________ let her down．

in order don’t

in order not to

not in order to

in order that not

Travelling to the moon ________ several days, and the trip ________ too much money．

costs, cost

takes, take

takes, costs

spend, pay

Do you know who is the first teacher ________ a computer in our school?

buy

buys

to buy

buying

He ________ to be in such a hurry because the plane won’t take off until two hours later．

needn’t

doesn’t need

didn’t need

needed not

It’s known to everyone that trees are important to us．The most important is that they can ________ oxygen for us．

protect

produce

prevent

take in

My ________ friend, Millie, lives ________ my house．

closing, closed at

closed, closed to

close, close with

close ,close to

The number; A number

The number; The number

A number; A number

A number; The number