Your favorite subject is English, while mine ____ mathematics.
A. was
B. are
C. is
D. will be
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Most research in this field ____ by the Russians.
A. has carry out
B. have carried out
C. has been carried out
D. have been carried out
All the surprises and gifts come from those who ____ you.
A. is to love
B. loved
C. loves
D. love
The pair of glasses ____him.
A. fit
B. is fit
C. fits
D. are fit
磁铁的两端磁性( )。
A. 最强
B. 最弱
C. 与中部一样