641.The group is made up ______ five students.And they are studying hard to make up ______ the lost time.
A.of;of
B.for;for
C.of;for
D.for;of
642.I was wandering ______ the streets when I caught sight of a tailor's shop.
A.across
B.through
C.by
D.past
641.答案是C;此题考查make up 构成的短语。Make up组成，构成，化妆，陪着，编造；be made up of由…组成；make up for lost time弥补失去的时间。注意:make up the missed lessons 补课。
642.答案是B;wander through the street在街上徘徊。
