523.If you really have to leave during the meeting,you'd better leave ______ the back door.

A.for

B.by

C.across

D.out

524.Many Chinese universities provide scholarships for students ______ financial aid.

A.in favour of

B.in honour of

C.in face of

D.in need of

523.答案是B;

leave by/through the back door 从后面离开；across 横穿。

524.答案是D;

句意:许多中国大学向那些需要经济帮助的学生提供奖学金。In favour of 支持；in honour of 为了纪念；in face of 面对；in need of 需要。