To ___ the puzzlement of the students, the teacher explained it once again to them.
| A．explain |
| B．instruct |
| C．clarify |
| D．classify |
Security was such a major concern at the conference that no journalists could approach the meeting zone without ________ the special pass.
| A．commanding | B．issuing | C．producing | D．involving |
—Mary, are you sure your aunt ___ back from America?
—Yes. My mother ___ me. I am going to see her now.
| A．has come; told | B．came; had told |
| C．had come; tells | D．is coming; has told |
—Did you enjoy yourself last weekend, Tom?
—Yes, as you know, ______ birthday party went on in _____ most pleasant atmosphere.
| A．the; the | B．a; the | C．the; a | D．a; a |
—Tony said he could fix my bicycle, but I really doubt it.
—_______. He’s very good at this sort of thing.
| A．Don’t worry | B．I couldn’t agree more |
| C．Of course | D．A piece of cake |
This article may be some advice about how to _________ oneself in society.
| A．behave | B．believe | C．perform | D．operate |