The plans flew smoothly ______ in the sky and people spoke ______ of the experienced pilots.
| A．high；high | B．highly；highly | C．high；highly | D．highly；high |
Many strange new means of transport have been developed in our century, the strangest of _____ being perhaps the hovercraft(气垫船).
| A．which | B．them | C．that | D．it |
___ the temperature might drop, coal was prepared for warming.
| A．To consider | B．Considered | C．Considering | D．To be considered |
We had a really bad time about six months ago but now things are ____.
| A．looking up | B．coming up | C．making up | D．turning up |
--- The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
---____ my students have a try?
| A．Shall | B．Must | C．Will | D．May |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |