单选题 We're doing a _____ about network games.

单选题 What _____you doing now?

单选题 —What activities do you usually do online? —I like _____ with my friends every day.

单选题 You should go over your_____carefully after class.

单选题 You should _____ your lessons carefully after class.

单选题 It's a bad habit to stay up ____ playing computer games.

单选题 It's a bad habit to _____ late playing computer games.

单选题 Mr Li is____ food on the Internet.

单选题 Look! Some visitors____ for the bus over there.