549.I have offered to paint the house ______ a week's accommodation.

A.in exchange for

B.with regard to

C.by means of

D.in place of

550. _________ achievement,last week's ministerial meeting of the WTO here earned a low,though not failing,grade.

A.In terms of

B.In case of

C.As a result of

D.In face of

549.答案是A;

in exchange for作为交换；with regard to至于，关于；by means of 通过…的方式;in place of 代替。

550.答案是A;

in terms of 按照,从…方面来说；in case of万一，以防；as a result of 由于；in face of 面临，不顾。