It is very _________ that in many schools the students are going to spend less time in doing homework than they used to．

possibly

probably

lovely

likely

While the book is welcomed by scholars, it will also _________ to the general readers．

adapt

appeal

addict

apply

_________ is known to us all is that the 2012 Olympic Games will take place in London．

It

Which

As

What

I just wonder _________ that upsets him so much．

what it is

what he does

how it is

why it does

Scientists say it may be five or ten years _________ it is possible to test this medicine on human patients．

since

when

after

before

Either you or one of your students ________ to attend the meeting that is due tomorrow．

has

have

are

is

The Ministry of Education is ________ primary and middle school students to perform one hour of physical exercise a day, which will be a major criterion for evaluating schools．

requiring

requesting

demanding

commanding

All countries need ________, timely and reliable climate information as well as high quality climate services, as they will benefit the whole mankind．

believable

accurate

particular

abstract

He paid for a seat, when he ________ have entered free．

could

would

must

may

________, the bus started at once．

The signal had been given

The signal to be given

The signal given

When the signal giving