Do you know the German student ____?
A. whom I often talk
B. with whom I often talk
C. I often talk
D. that I often talk
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It is well known that Edison's success was ____ to his intelligence and hard work.
A. referred
B. contributed
C. subjected
D. attributed
There will be an exciting film ____ at the cinema next week.
A. on
B. in
C. up
D. over
The villagers all agreed to ____ the railway into the mountains.
A. spread
B. enlarge
C. extend
D. increase
B细胞表面，BCR信号转导的分子是
A. CD79a/CD79b
B. CD40
CD32
D. CD19
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