单项选择1.I always ____ my notebook before I do my English homew

单项选择
1.I always ____ my notebook before I do my English homework.
A.look after B.look at C.look into
2.---_____ are you going to Beijing ____?
---I'm going there to have a meeting.
A.Why,for B.What,/ C.What,for
3.They ____ a river,and walked ____ a forest,finally found a village house.
A.crossed,through B.across,through
C.crossed,across
4.---What was your brother doing at this time yesterday?
---He was reading a magazine ____ I was writing an e-mail at home.
A.while B.after C.until
5.---____ do you play football?
---Once a week.
A.How much B.How long C.How ofter