I don’t become a serious climber until the fifth grade, ______ I went up to rescue a kite that was stuck in the branches of a tree.
The stone on the river bank rolled under her feet; she was _____into the river,and she called out for help.
-What do you do yesterday afternoon? -I went to the bookstore,___ some books and visited my uncle.
Exercise is ______ as any other to lose unwanted weight.
-Do you think we can get there on time? -Yes,_______ the truck doesn’t break down.
The new machine,if _________ properly,will work at least ten years.