235.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
236.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