While every possible means __________ to prevent the river pollution, the river in my hometown has still not been restored to its past beauty.
#100447
A
is tried
B
are tried
C
has been tried
D
have been tried
推荐题目
You don’t have to pay for your flights ; they’re in the price of your holiday .
#103836
A
concluded
B
held
C
settled
D
included
What a pity! When we got to the cinema, the movie Let the Bullets Fly _________, so we saw only the end of it.
#102592
A
was finishing
B
has just finished
C
just finished
D
had just finished
-----Did you have a hard time traveling back home?-----Yes, it ______ for four days when I arrived in Guiyang and all the roads______ covered with ice.
#100845
A
snowed, were
B
was snowing, had been
C
had been snowing, had been
D
had snowed, were
Look at the trouble I am in! If only I __________ your advice.
#103223
A
followed
B
would follow
C
had followed
D
should follow
The harder you_______ , the greater progress you______ .
#103025
A
will study; will make
B
will study; make
C
study; make
D
study; will make