---Come on, let’s go for a drink. ---Sorry. With so many problems _____ my mind, I can’t take a break.

 John received an invitation to dinner, and with his work______, he gladly accepted it.

Years later, he returned home, unexpectedly the old tree of his childhood__________.

With the entrance examination _____ up, our classmates work harder and harder.

 Wth so much work ______ my mind, I almost break down.