The words that we should pay attention to ___________ on the blackboard.
#44881
A
being written
B
are written
C
is writing
D
writing
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Every year lots of trees ____________ to make our country more beautiful.
#44817
A
is planted
B
was planted
C
are planted
D
were planted
---Why is the classroom so dirty? --- Sorry, sir. It ______ yesterday. We forgot to do it.
#44831
A
doesn’t clean
B
didn’t clean
C
isn’t cleaned
D
wasn’t cleaned
— May we leave the classroom now?— No, you _______. You _______ to leave until the bell rings.
#44633
A
mustn’t; are allowed
B
can’t; aren’t allowed
C
don’t have to; are allowed
D
needn’t; aren’t allowed
I haven’t seen you ____________.
#44828
A
for two months
B
since three weeks
C
since last Monday ago
D
two days ago
About seventy percent of the earth with water.
#44524
A
is covering
B
is covered
C
are covering
D
are covered