Mary didn’t want ofthe two kinds and asked the shop assistant to showher.

下列各句中，没有语病的一句是（　　）

d phoning her office, but I couldn’t _______

May I surf the Internet tonight?—No, you _____. You must do the exercise.[ ]

Once children reach the age of 18, they are encouraged to be ______ and make a living on their own.[ ]