The plane ______ when we got to the airport.
A. had taken off
B. has taken off
C. will take off
D. is taking off
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China is not ________ it used to be
A. that
B. how
C. whether
D. what
The police ________ looking into the accident now.
A. is
B. Was
C. are
D. were
Our factory is three times as _______ as theirs.
A. the bigger
B. bigger
C. biggest
D. big
________ of the students will have chances to go to college in the future
A. Three four
B. Three fourths
C. Thirds fourths
D. Thirds fourth
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