Every possible means to prevent the air pollution, but the sky is not still clear.
#101886
A
is used
B
are used
C
has been used
D
have been used
推荐题目
The hearts and minds of the fans ______ by the song “Bad Romance” since it hit the shops.
#102863
A
captured
B
were captured
C
have captured
D
have been captured
Mr. Black _______Shanghai in a few days. Do you know when the earliest plane _______ on Sunday.
#100720
A
leaves; takes off
B
is leaving; takes off
C
is leaving; is taking off
D
leaves; is taking off
Because the shop ________ , all the T-shirts are sold at half price.
#104747
A
has closed down
B
closed down
C
is closing down
D
had closed down
—The former president of Iraq was caught at last.—Really? Where himself?
#104842
A
has he hidden
B
had he hidden
C
was he hidden
D
has he been hidden
To everyone’s amazement now, technology ________ faster than most people can keep pace with.
#102208
A
is changing
B
will change
C
changes
D
has changed