Square Dancing is good exercise for the old， sometimes it makes a lot of noise．（ ）
A．IfB．AlthoughC．UntilD．Because
Excuse me， I am doing a survey． May I know to pay？
About five times a week．（ ）
A．when you choose WeChat
B．whether did you try We Chat
C．how often you use WeChat
D．why do you prefer We Chat
All of us will take the entrance exam for the senior high school in June．
!（ ）
A．Of courseB．Good luck
C．CongratulationsD．You're welcome
Miss Yang， are you this afternoon？ I'd like to ask you some questions．
Yes， I will wait for you in my office．（ ）
A．afraidB．availableC．absentD．active
Which should we start with， Water World or Space World？
Either is OK， it makes no to me．（ ）
A．mistakeB．promiseC．differenceD．decision
Lucy is walking the dog in the park．
She be． Listen! She is singing loudly in her room．（ ）
A．can'tB．mustn'tC．needn'tD．won't