Ben has to study for the English test同义句 Ben3个空 studay for t

只有三空的话,可以改成：has got to
即：has got to do sth = has to do sth 不得不做某事
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Ben needs to study for the English test ,Ben must study for the English test ,Ben should study for the English test ,Ben gotta to study for the English test ,

既然 要求 是三个空 就不能填四个 单词
参考答案是 Ben is supposed to studay for the English test

你肯定3个空？
假如4个空
can do nothing but/except
has no choice but