气体打火机中的丁烷气体是在 条件下,用 方法,使其 贮存在打火机内.
常温;压缩体积;液化
----_______I come back before 11:00?
----No, you________. But you ________be back later than lunch-time.
A.Can; can’t; may
B.Must; needn’t; can’t
C.Need; mustn’t; must
D.May; needn’t; can’t