A landing on Mars is within the _____ of current physical theory.
| A．scheme | B．scope | C．scrap | D．scale |
It is reported that ________ European chemist called Felix Hoffmann first produced ASA which completely changed ________ man’s understanding of aspirin.
| A．a; / | B．an; a | C．the; a | D．an; / |
Will these vegetables _________ for four to five days in the fridge?
| A．be stayed fresh | B．stay fresh | C．stay freshly | D．be stayed freshly |
The audiences’ reaction made it ________ that this play was a great success.
| A．evident | B．familiar | C．relevant | D．sceptical |
More and more fast-food restaurants have ________ all over the town in the last few years.
| A．picked up | B．taken up | C．sprung up | D．put up |
You just can’t imagine what a bad impression some Chinese left _____foreigners while travelling abroad, so it is necessary to impress _____ people the importance of good manners.
A. on, to B. on, on C. to, on. D, to , to