they (both can) swim across the river,（）中为啥需填both can?
有嘉奖oh
（）中为啥需填 both can
而不填can both
both不是需要放在情态动词后吗?
人气：396 ℃ 时间：2020-05-09 15:45:19
解答
也可以填can't啊.
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