题目内容
【题目】The students (受益于) these after-school activities since then.
【答案】have benefited from
【解析】have benefited from 考查时态。本句的时间状语是since then，该时间状语通常和现在完成时连用。句意：从那时起，学生们动课外活动中收益很多。
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题目内容
【题目】The students (受益于) these after-school activities since then.
【答案】have benefited from
【解析】have benefited from 考查时态。本句的时间状语是since then，该时间状语通常和现在完成时连用。句意：从那时起，学生们动课外活动中收益很多。