Hundreds of jobs ________ if the factory closes．

lose

will be lost

are lost

will lose

I allow my children spend as much time watching cartoon as they ________ studying．

does

do

are

is

The new model costs twice ________ last year’s．

more than

as much as

as many as

than

What is new, however, is the scientific attempt ________ whether other planets beyond our own have given birth to advanced civilizations．

discover

discovers

discovering

to discover

Astronauts can be affected by loneliness for they have to sit in the spacecraft for weeks with very little ________ and no one ________．

to do; to talk

doing; to talk to

to do; to talk to

doing; to talk

There are so many reference books for matriculation of postgraduate and I haven’t decided which book ________．

to buy

buy

to be buying

buying

He attended an evening class ________．

each other day

every other days

each other days

every other day

We have physics on Tuesday, Thursday and Saturday; that is, we have it ________．

every other days

every three days

every other day

each two days

Every possible means ________ to prevent the air pollution, but the sky is still not clear．

has to use

are used

has been used

have used

Has the boy who was made use of ________ realized his mistake?

stealing

stolen

to steal

for stealing