﹣﹣﹣You _______ take photos here!Look at the sign.It says"No photos".
﹣﹣﹣ Sorry，I won't.（ ）
A．mustB．needC．mustn'tD．needn't
﹣﹣﹣Our class won the first prize in today's basketball match.
﹣﹣﹣_______ exciting news it is!We're all glad about it.（ ）
A．WhatB．What anC．HowD．How an
﹣﹣﹣Shall we go out and do some outdoor activities？
﹣﹣﹣_______.（ ）
A．You're welcome
B．That's a good idea
C．Don't worry
D．It's none of your business
Paper is ________ useful invention.It was invented around 2，000 years ago by Cai Lun.（ ）
A．aB．anC．/D．the
﹣﹣Shall we go for a walk？
﹣﹣_____________.It's too dark.We'd better stay at home.（ ）
A．Nice ideaB．That's true
C．Don't be sillyD．I agree with you