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
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----You look pale and upset. ----Yes, my girl friend _____ an online chat with me non-stop until six o’clock this morning.
#104830
A
have been having
B
had had
C
was having
D
am having
The fact that so many people still smoke in public places____ that we may need a nationwide campaign to raise awareness of the risks of smoking.
#99646
A
suggest
B
suggests
C
suggested
D
suggesting
He will work in a big company after he _____ the university.
#101540
A
graduates from
B
graduate from
C
will graduate from
D
graduation from
Great changes ______ in my school in the past ten years.
#100927
A
took place
B
were taken place
C
have taken place
D
have been taken place