Mom， could I go out with my friends？
______，but you have to come back before 10：00．（ ）
A．Sorry， you can'tB．Yes， you can
C．No way
I have ______eight﹣month﹣old sister and she is very lovely．（ ）
A．aB．anC．the
My mother was badly ill in hospital yesterday． I had to look after her， so I didn't go to have the picnic．
______．（ ）
A．Never mind
B．I am sorry to hear that
C．No problem
The man______ is talking to my math teacher is my father．（ ）
A．whoB．whichC．what
_____ Wugang Airport_____ last year？（ ）
A．Did； buildB．Had； builtC．Was； built
Must I go home now？
No， you_______．（ ）
A．mustn'tB．needn'tC．shouldn't