yWho willgive lecture—MrWang, famous professor from NanjingUniversity

His parents thought he was working very hard in the room, _____in fact, he was chatting with his friends on the Internet.

It’s quite ____ of beginners to forget to use an article before a noun. [ ]

can ____ a second, I’ll look forBob and tell him you are on the phone for him

a sudden, the thief walking behind ayoung and pretty lady _______ her purse, ______into the crowd.