1.Professor Smith seldom _______ the class on time.
2.Mr. Wang _______ his wife and children when he went to the United States.
3.He _______ a lot of time in trying to develop the education system in this area.
4.They spent many years _______ for oil in this small island.
5.We can´t _______ the fact that we are still a developing country.
6.Can you _______ the man who robbed you of your watch?
7.Many children in developing countries can not go to school,because of _______
8.What is your _______ to his coming?
9.He _______ into the water and rescued the little girl.
10.You may _______ of the extra books in our department library.