733.China's first train from Beijing to Tibet _____on Saturday carrying business travelers on the world's highest railway.

A.set out

B.set about

C.set down

D.set up

734.His eyes were ________Della, and there was ______ in them that she could not _______.

A.fixed on;expression;read

B.fixing upon;expression;believe

C.fixed on；an expression;find

D.fixed upon;an expression;understand

733.答案是A；

set out动身，出发;set about开始做，着手;set down记下，写下；set up建立;创立。此外，set out to do sth, =set about doing sth.着手干某事。

734.答案是D；

fix one s eyes on upon sb./sth.为固定短语。此处expression为可数名词，应加冠词。