单项选择题

Mosquitoes are only means of ______ of malaria.

A．transference
B．transformation
C．transition
D．transmission
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单项选择题
Don't rest on your laurels; ______ your success and start looking for new markets now.
A．add up
B．follow up
C．work up
D．count up
单项选择题
Ben's wife lost the case, which ______ her enormously.
A．compressed
B．depressed
C．impressed
D．suppressed
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