题目内容
() 4. on Mars have to wear special boots themselves heavier.
A. Human;to make B. Humans;to make
C. Human;make D. Humans;making
4.B
4.B
(根据谓语动词have可知“人”应该用humans ,动词不定式作目的状语，故选 B. )
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题目内容
() 4. on Mars have to wear special boots themselves heavier.
A. Human;to make B. Humans;to make
C. Human;make D. Humans;making
4.B
(根据谓语动词have可知“人”应该用humans ,动词不定式作目的状语，故选 B. )