It is written clearly in the requirements that all passengers check onto board thirty minutes before the plane takes off.
| A．may | B．can | C．will | D．shall |
In communication, a smile is usually _____ strong sign of a friendly and _____ open attitude.
| A．a; / | B．the; / |
| C．a; an | D．the; an |
The police went to the forest in search of the escaped prisoner, but _____ success.
| A．with | B．in | C．for | D．without |
Our headmaster requested Jane Goodall and Yuan Longping to give us a lecture but _____ of them accepted the invitation because they were too busy then.
| A．neither | B．either |
| C．both | D．none |
---Shi Changxu was awarded a special state prize for his scientific research.
--- He certainly ______ that honor, for he has devoted so much to the country.
| A．expects | B．observes |
| C．deserves | D．respects |
He got_______ when he tried to save the child from the ________ house.
| A．to burn; burning | B．a burn; burnt |
| C．burning; burned | D．burned; burning |