一、I have some trouble ____physics.I would be grateful_____you if you could give me some advice on it. [a.with;for b.in;to c.with;to d.in;with]
二、All these gifts must be mailed immediatel_____in time for Christmas.
[a.in order to have received b.in order to receive c.so as to be received d.so as to be receiving]
c我在物理上遇到一些困难，如果你能给我一些建议的话我会十分感激
c这些圣诞礼物都应及时寄出
一、B I have some trouble in____physics.I would be grateful_to____you if you could give me some advice on it. [a.with;for b.in;to c.with;to d.in;with]
二、All these gifts must be mailed immediatel_c____in time for Christmas.
[a.in order to have received b.in order to receive c.so as to be received d.so as to be receiving]