Ladies and gentlemen, please turn off yourmobile phones. The plane will _________ soon.

How beautifully she sings!–SO she does．She has a sweet ．

I know you have a new sweater. Can I have a look—______.

The show was so funny that it made everyone ______ again and again.

______ nearly all behavior is learned behavioris a basic assumption ______ has been put forward by the social scientists