—Wow, you have a really good voice. I_____ you were good at singing.
—Thank you.
| A．haven't known | B．hadn't known |
| C．didn't know | D．don't know |
Emergency line operators _______ always stay calm and make sure that they get all the information they need to send help.
| A．can | B．would | C．must | D．might |
— I’m still working on my project.
— Hurry up, or you’ll miss the deadline. Time is _______________.
| A．running out | B．dying out | C．giving out | D．bursting out |
The command has just arrived that all employees ____________ in their proper uniforms before 7:00 pm.
| A．will be dressed | B．must be dressed |
| C．were dressed | D．be dressed |
I just wonder ____________ that makes him so excited.
| A．why it does | B．what he does | C．how it is | D．what it is |
— So many ages since I last saw you that I ____________ you at all!
— I wouldn’t have, either, if someone _____________ your name.
| A．didn’t recognize; hadn’t called | B．didn’t recognize; didn’t call |
| C．haven’t recognized; didn’t call | D．wouldn’t have recognized; hadn’t called |