31.The company had about 20 notebook computers but only one third _______used regularly . Now we have 60 working all day long.
While prices are rising so fast,many people are working out ways to________their expenses.
—What are you going to do this weekend? —________.If time permits,I may go to Shanghai with my friends.
I thought the teacher would say something about our exam result but he________it.
She can’t help________the house because she’s busy making a cake in the kitchen.
The official________I thought would be seriously punished received a raise instead.