203.They are broadening the bridge to ____ the flow of traffic.

A.put off

B.speed up

C.turn on

D.work out

204.If you ____ faults but you still want the bicycle, ask the shop assistant to reduce the price.

A.come across

B.care about

C.look for

D.focus upon

203.答案是B；考查动词短语的辨析。句意:他们正在拓宽桥梁以加快交通流量。put off推迟； speed up加快;turn on打开(水龙,电视、收音机、灯，煤气等）；work out算出，解答出。拓宽桥梁的目的是加快交通流量，故选B。

204.答案是A；考查动词短语的辨析。come across偶然遇到，无意中发现;care about关心，在乎;look for寻找;focus upon专注于。句意:如果你发现这辆自行车有毛病但还是想要的话，可以要求这家商店的营业员减价。