Many trees and flowers ______ in our school last year and they made our school a beautiful garden.
#41523
A
have planted
B
are planted
C
were planted
D
will be planted
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– Look at these factories. I hate them. They____ many rivers here. --Yes. Something ______ to stop the pollution.
#39701
A
polluted, must do
B
had polluted , must be doing
C
have polluted , must be done
D
were polluting, must be done
   ---     Bob doing homework?---No, he isn’t. He is        a letter.
#41826
A
Does, writes
B
Is, writes
C
Does, writing
D
Is, writing
We’ll go to the park unless it ____tomorrow.     
#38365
A
rains
B
willrain
C
rainy
D
isgoingtorain