It's the first time that he has been to Australia, （）

单项选择题Peter's jacket looked just the same as Jack's, but it cost （）his.

A. as much twice as
B. twice as much as
C. much as twice as
D. as twice much as

单项选择题Children need friends （）their own age to play with.

A. of
B. for
C. in
D. at

单项选择题My parents have promised to come to see me before I （）for Africa.

A. have lef
tB. leave
C. left
D. will leave

单项选择题It just isn't fair （）I was working as a waiter last month; my friends were lying on the beach.

A. whenever
B. though
C. for
D. while

单项选择题The traffic is heavy this day, I （）arrive a bit late, so could you save me a place

A. can
B. must
C. need
D. might