If it ______ Professor Russel standing up for him, he would have had to leave.
A. hasn't been for
B. hadn't been for
C. was for
D. were for
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Don't forget Ann wants a big doll, ______
A. do you
B. will you
C. don't you
D. won't you
化疗指数是指
A. LD5/ED50
B. ED95/LD5
C. LD50/ED50
D. ED50/LD50
E. LD1/ED99
It is believed that the authorities are thinking of __ new taxes to raise extra revenue.
A. impairing
B. imposing
C. invading
D. integrating
Bacteria are sometimes ______ too small to be seen without a microphone.
A. far
B. rather
C. quite
D. very
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