皮带传动装置:英语选择题!!◎!◎

来源:百度文库 编辑:神马品牌网 时间:2024/05/15 07:34:29
The fence needs _____but wo can;t do it until the coming fall
A/mended B to mend C to be mended
答案选C
为什么

need to be done=need doing
所以选择C.

应该是mending

'c'....
because it haven't happen yet....

need 后面要么加名词或名词性代词,要么加不定式短语to+verb,要么加动词的现在分词verb+ing

需要被修改。
被动语态