One-third of the area ________ covered with trees. About seventy percent of the trees ______

 One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.

#85732

is; has

is; have

are; have

are; has

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________ his brothers.

#44004

This is

That’s

These are

That’s isn’t

—Is there anybody in the classroom ?—No, the teacher, together with the students _____ to the playground.

#86312

went

has gone

have gone

Not only my friends but also I ______ interested in those plays.

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are

were

 Mom used only half of the money, the rest of which ______ saved for other purposes.

#85962

are

was

were

The number of students in our school ____about 30,000 and ______them study hard.

#85877

is; a large amount of

are ; a number of

are ; large amount of

is ; a large number of

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