问题

To live on Mars, you need to wear boots which ________ to prevent you from floating off into space.
A:design
B:designed
C:are designing
D:are designed;
B:designed
C:are designing
D:are designed;
正确答案是:
同类题型
She didn’t come to his birthday party just_____ what he had said to her the day before.
will you be at the party tonight—Yes, but I have so much homework to dothat I really__________
The headmaster spoke as _____ as she could to make the students understand her.
-What troubledo you have when you learn English-__________the grammar in a right way.
A ____ girl named Dong Xinyi looked after her disabled(残疾的) father.