337.If it is quite ____ to you,I will visit you next Tuseday.

A.convenient

B.ordinary

C.fragile

D.precious

338.Life is too short to waste and too _____ to give up.

A.expensive

B.accessible

C.affordable

D.available

337.答案是A；

convenient 方便的。

338.答案是D;

expensive 昂贵的；precious 宝贵的，珍惜的。句意:人生太短暂，太宝贵以致不能轻易地浪费或放弃。