With more forests being destroyed, huge quantities of good earth __________ each year, which __________ that our environment is suffering.
#101375
A
are washing away, suggest
B
is being washed away, suggest
C
have been washed away, suggests
D
are being washed away, suggests
推荐题目
 —What’s the noise?   —Oh, I forget to tell you. The new machine     .
#99908
A
has been tested
B
is tested
C
will be tested
D
is being tested
I’ll go to bed as soon as my homework______.
#103981
A
do
B
does
C
are done
D
is done
I have been working here since I _______ this new position.
#101688
A
offered
B
have offered
C
was offered
D
had been offered
Great changes in every field _____ in the last ten years. 
#99202
A
take place
B
took place
C
have taken placed
D
had taken place