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Half of the class ________ done most of the work．The left ________rather hard．

A．have ; is

B．has; is

C．have ; are

D．has ; are

The scientist's last words ________us that we should protect the environment around us．

A．recommended

B．remembered

C．replied

D．reminded

If the question ________ incorrectly, ________ question will be given to you

A．is answered, other

B．answers, other

C．is answered, another

D．answers, another

John, you ________ play with the knife, or you ________ hurt yourself．

A．won't; can't

B．mustn't; may

C．shouldn't; must

D．can't; shouldn't

Now the air in our city is ________ than it used to be．Something must be done to stop it．

A．very good

B．much better

C．rather bad

D．even worse

Most of the choices appear to be ________ ones that you are familier with, but after taking________ second look, you will find that they are different．

A．/; the

B．the; the

C．the; a

D．/; a

________ your daughter often help you ________ the housework?

A．Do, for

B．Do, with

C．Does, for

D．Does, with

That bag is too ________, who can help me carry it?

A．long

B．interesting

C．heavy

D．light

Hobo doesn't know ________．

A．when to do

B．what to do

C．how to do

D．where to do

Simon is wearing clothes from ________．

A．the 1980

B．1980 s

C．the 1980 s

D．1980^'s