With the old man ______ the way,  we had no trouble in finding the village.

The factory produced many famous cars, none of ____ shipped to foreign countries.

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

In the reading room, we found her 　　　 at a desk, with her attention _____ 　　　 on a book. 

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