As a result of destroying the forests, large ____ of desert ___

 As a result of destroying the forests, large ____ of desert ____ covered the land.

#85988

number; has

quantities; has

number; have

quantities; have

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A number of students        trees every year and the number of them        increasing.

#85859

plant; is

plants; is

planting; is

planting; are

Three months ________ since we met last time.

#43467

have past

have passed

has past

has passed

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

#43622

is; are

are; is

are; are

is; is

The headmaster and secretary as well as the teachers      discussing LiBai’s New Selected Poems that      published last month.

#85703

are; were

is; were

are; was

is; was

 Every possible means_____ been tried，and we find only______ this means can we do it well．

#86084

have，in

have，by

has，in

has，by

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