He always _____(come up with) good solutions to his friend's problem.答案是comes up with为什么不是coming up with,不是有一个词组是always doing

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He always _____(come up with) good solutions to his friend's problem.答案是comes up with为什么不是coming up with,不是有一个词组是always doing

He always _____(come up with) good solutions to his friend's problem.答案是comes up with为什么不是coming up with,不是有一个词组是always doing
He always _____(come up with) good solutions to his friend's problem.答案是comes up with为什么不是
coming up with,不是有一个词组是always doing

He always _____(come up with) good solutions to his friend's problem.答案是comes up with为什么不是coming up with,不是有一个词组是always doing
be always dong sth.
前面没有be
如果用doing,就没有动词(宾语)了