These discoveries may throw light on the origins of the universe. The underlined part mean

Traffic separation schemes may be （)by the Organization for the purpose of these Rules.

may act as a cause of these illnesses.A、StressB、RelaxationC、Happiness

【C19】A．throw intoB．throw awayC．throw upD．throw about

These machines may（) in our work.A. needB. neededC. are neededD. be needed

Alike light waves, microwaves may be reflected and concentrated.

Dont______this book. It may be used later.A．throw offB．throw downC．throw upD．throw away