In our school library there ____ a number of books on science and the number of them ___

In our school library there ____ a number of books on science and the number of them ____ growing larger and larger.

#43975

is; are

are; is

is; is

are; are

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The number of tigers in Asia________ getting smaller and smaller and a large number of people_________ trying to protect them．

#43555

are；are

is；is

is；are

are；is

Two kilograms ______ too heavy for a sick man.

#86078

are

was

were

I, who, ________your classmate, will support you forever.

#86059

are

E-mail, as well as telephones, ______ an important part in daily communication.

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isbeingplayed

areplaying

haveplayed

isplaying

You should never base anything on a theory that _________ impractical in practice.

#86010

is proved

prove

proves

proved

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