If nothing______, the oceans will turn into fish deserts. 
#99587
A
does
B
had been done
C
will do
D
is done
推荐题目
-----What _____?-----I______my key and can't open the door. 
#104186
A
happened, lost
B
has happened, lost
C
happens, have lost
D
has happened, have lost
He __________ to go abroad for his further study.
#103171
A
is hoped
B
is dying
C
is wanting
D
dies
— What were you doing when I phoned you last night?— I ______ my homework and was starting to surf the Internet.
#100538
A
have already finished
B
was finishing
C
was going to finish
D
had just finished