You've no idea ___________to build a new airport． Let me tell you， young man． That's billions of dollars!（ ）
A．how much it will cost
B．how long it will take us
C．how much will it cost
D．how long will it take us
--- Hurry up! The bus is coming.
--- Wait a minute.Don’t cross the street the traffic lights are green.
| A．after | B．until | C．while | D．Since |
— Was it under the tree ________ you were away talking to a friend?
— Sure.But when I got back there, the bike was gone.
| A．that | B．where | C．which | D．While |
Talk to your teacher and you will get help ________ you have a problem.
| A．unless | B．if | C．until | D．so |
They got up early_____ they could catch the early bus.
| A．that | B．in order to |
| C．so that | D．to |
—Will you come to the dinner party?
— I won’t come unless Jenny____.
| A．will be invited | B．can be invited |
| C．invited | D．is invited |