—The twins will fly to New York with their parents this evening?
---No.In fact, their plane ___ from Shnaghai ahead of time.
| A．has taken off | B．will take off | C．is taken off | D．is being taken off |
— Was her concert a great success?
— Sure. _______ such a good chance, how could she let it slip away?
| A．Having given | B．Giving |
| C．Having been given | D．Being given |
______is now no doubt ________ global warming is a security threat to us all.
| A．It; that | B．There; that | C．There; whether | D．It; whether |
The doctors say that good diet, exercise and fresh air, all of which _____ the health and long life.
| A．lead to | B．refer to | C．stick to | D．contribute to |
On farewell party the foreign teacher gratefully_____ all the helps from all the school.
| A．thank | B．acknowledge | C．claim | D．declare |
On that cold day, only_____handful of people were at the station, where I made_____ acquaintance of Mr. Smith.
| A．a; an | B．a; the | C．the; a | D．the; the |