Since the time humankind started gardening, we _____to make our environment more beautiful.
#99086
A
try
B
have been trying
C
are trying
D
will try
推荐题目
—Excuse me, but could you please turn the radio down?—Sorry, I you could hear it.
#102834
A
don’t realize
B
haven’t realized
C
didn’t realize
D
hadn’t realized
His failure in the experiment suggested that he ________ his teacher’s proper instructions.
#101852
A
should not have followed
B
should not follow
C
mustn’t have followed
D
hadn’t followed
Rainforests ____ and burned at such a speed that they will disappear from the earth in the near future.
#101404
A
cut
B
are cut
C
are being cut
D
had been cut
Great changes _____ in China in the past 30 years and many Chinese are living a happy life today.
#99354
A
took place
B
were taken place
C
have taken place
D
have been taken place
--How’s that? Who broke the glass? ---Well, it ___me. I was doing my homework the whole evening.
#103580
A
hasn’t been
B
hadn’t been
C
weren’t
D
wasn’t