We want to rent a bus which can _______ 40 people for our trip to Beijing．

load

hold

fill

support

What we used to think _______ impossible now does seem possible．

is

was

has been

will be

Although medical science _______ control over several dangerous diseases, what worries us is that some of them are returning．

achieved

has achieved

will achieve

had achieved

It is said that in Australia there is more land than the government knows _______．

it what to do with

what to do it with

what to do with it

to do what with it

Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it．

to see

to be seen

seeing

seen

She will tell us why she feels so strongly that each of us has a role _______ in making the earth a better place to live．

to have played

to play

to be played

to be playing

I’m going to the supermarket this afternoon．Do you have anything _______?

to be buying

to buy

for buying

bought

As the twentieth century came to a close, the raw materials for a great national literature were at hand, waiting _______．

to use

to be used

to have used

to be using

Mr．Green stood up in defense of the 16-year-old boy, saying that he was not the one _______．

blamed

blaming

to blame

to be blamed

The Chinese are proud of the 29th Olympic Games _______ in Beijing in 2008．

hold

holding

held

to be held