帮我英语句子填空蟹蟹!【用介词】\ 6点半前要用!蟹蟹!

帮我英语句子填空蟹蟹!【用介词】 6点半前要用!蟹蟹!
This is my first visit ____ HongKong.
What do you need ____ your birthday?
Here's the weather ____ Wednesday.
An airplane is flying ____ our school.[A.on B.in C.above]
Lily's habits are different ____ Linda's.[A.for B.from C.of]
How many bridges are there ____ the Huanpu River now?[A.on B.cross C.above D.over]