We _______ pay to get into the concert. It's free.
| A．can't | B．mustn't | C．might not | D．don't have to |
Put on your coat, Jack! It's snowing _______ outside at the moment.
| A．hardly | B．quickly |
| C．loudly | D．heavily |
—Is that Tom in the teachers' office?
--No, it ________ be him. He's gone to the hospital.
| A．musn't | B．shouldn't |
| C．can't | D．needn't |
Last night, Dan hung out with his friends too late. When he came home, he went upstairs without a _______. But to his surprise, his father was sitting in his room.
| A．noise | B．sound |
| C．voice | D．silence |
---Why didn't you go to the party last night?
---Because I was waiting for Sam in his office _______ he came back.
| A．for | B．until |
| C．since | D．from |
—Hey! Peter! What are you looking at?
---I find ________ hole in the blackboard, let's go and tell Mr. Wang about it.
| A．a | B．an | C．the | D．\ |