— Hello, you look tired today. —Yes, I slept too late yesterday evening. I  my homework and forgot the time.
#42512
A
was doing
B
did
C
have done
D
had done
推荐题目
– 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