In my opinion, it is about time that we ________ new computers．

had

shall have

will have

have

We had to be patient because it would be some time ________ we got the full results．

since

before

after

until

The elderly lady wonders if her long lost son can still be back alive．Such things ________ and do happen．

can

must

will

need

It's reported that two schools, ________ are being built in my hometown, will open next year．

they both

which both

both of them

both of which

I love my school．Growing in the garden in front of our classroom ________ the flowers of different kinds．

is

are

was

were

________ by the growing interest in nature, more and more people enjoy outdoor sports．

To be influenced

Influencing

Having influenced

Influenced

Listen!His family must be quarreling, ________?

mustn't it

isn't it

aren't they

needn't they

It was over ten years ________ the Internet became a household word．

before

until

since

after

When ________ about the source of his income, he hesitated for a moment, obviously not willing to give us a direct answer．

asked

asking

being asked

having asked

In the past few months, a discussion ________ about whether selecting“Three Goods”Students in elementary and middle schools should be cancelled．

has to be held

has been held

has been holding

was held