Deserts, dry areas with _____ no vegetation, cover more than one-third of the Earth's land surface.
| A．surprisingly | B．eventually | C．permanently | D．virtually |
American English has so many _________ because the American people have come from all over the world.
| A．grammar | B．vocabulary |
| C．pronunciations | D．dialects |
A large number of students in our school ____ from the countryside; the number _____ growing these years.
| A．is; has been | B．are; has been |
| C．is; have been | D．are; have been |
He looked at the envelope and __________ Jenny’s handwriting immediately.
| A．understood | B．knew |
| C．recognized | D．recovered |
It is said that more than ten thousand workers have ______ the strike(罢工).
| A．joined | B．joined in |
| C．attended | D．take part |
This exam is very difficult. Many students are concerned ________the results.
| A．about | B．with | C．in | D．of |