go on,keep on,pass on,carry on后面都可以接現(xiàn)在分詞doing,
只有go on后面可以接不定式to do,
所以選going on.
Research is ___to make the process cheaper.
Research is ___to make the process cheaper.
going on
keeping on
carrying on
passing on
why?
going on
keeping on
carrying on
passing on
why?
英語人氣：357 ℃時間：2020-06-04 13:12:47
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