____ your friend _____ the guitar at the concert（演奏会）— Yes, he will.

of the keynurotransmitters influencing our mood, and ________it helps to relieve mooddisorders

I shall never forget the days ______ I stayed in Africa, ________ has brought me a lot of advantages.

It’s nice ____ you to tell me the news becauseit’s very important _____ me.

Chinese students are good at taking exams and you can’t imagine what they are willing to to succeed.