B
However后面要加逗號之后才接句子
The problem is difficult,（ ）he has worked it out.
The problem is difficult,（ ）he has worked it out.
A.however
B.yet
C.while
D.and
為什么不能用however而要用yet?具體回答!
A.however
B.yet
C.while
D.and
為什么不能用however而要用yet?具體回答!
英語人氣：983 ℃時(shí)間：2020-02-04 21:23:38
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