it depends on_____scientists could develop plants that can grow on Mars(用that,if,whether填空)

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itdependson_____scientistscoulddevelopplantsthatcangrowonMars(用that,if,whether填空)itdependson_____sci

it depends on_____scientists could develop plants that can grow on Mars(用that,if,whether填空)
it depends on_____scientists could develop plants that can grow on Mars(用that,if,whether填空)

it depends on_____scientists could develop plants that can grow on Mars(用that,if,whether填空)
it depends on_whether____scientists could develop plants that can grow on Mars.

whether 是正确答案。原因:depend on 短语中,后面一个词 on 是介词。在介词后表示“是否”这个意思,用 whether 而不用 if。只有动词后面的宾语从句“是否”才可以用 if 和 whether 两个词互换。that 没有“是否”这个意思。

选择Whether.当Whether和If同时出现时,你知道是“是否”的意思时,选择“whether”一定不错。