单项选择题

Good technique in medicine means less pain and fewer deaths and, ______ it is our duty to master it.

A．altogether
B．therefore
C．otherwise
D．however
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单项选择题
I ant at least ______ age ______ Robert if I am not older than he.
A．the same...as
B．the same...with
C．as same...as
D．as same...with
单项选择题
______, box cannot be lifted by a boy of five.
A．So a heavy
B．So heavy a
C．A such heavy
D．Such heavy a
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