第1个回答 2011-01-07
选C。
这是一个省略句，补全后是I would mend your radio, but I don't know how to mend your radio.
英语句子如果有相同的成分，往往省略其中一个成分。
动词不定式可以与特殊疑问词连用。如：
what to do,
why to go,
when to leave,
how to solve the problem,
etc.
第2个回答 2011-01-07
选择C. how to
原句应该是I would mend your radio, but I don't know how to mend your radio.
因为句子前面已经出现过mend your radio了，后面可以省略，但是不定式to不可以省略。
第3个回答 2011-01-07
选C。 我不知道怎么修理I don't know how to mend. 因为前面已经有mend，这里成分省略到动词不定式符号to即可。
-----Would you want to have a cup of tea?
----- I'd like to.
第4个回答 2011-01-07
C. how to 百分之百正确
因为补全后是I would mend your radio, but I don't know how to mend your radio. 英语句子如果有相同的成分，往往省略其中一个成分。
第5个回答 2011-01-08
A。完整的是how to do it.这里是省略了不定式。
I don't know how. 或I don't know how to do it.都可以。