With more forests being destroyed, huge quantities of good earth _____each year.
| A．is washing away | B．are being washed away |
| C．are washing away | D．is being washed away |
Every one of us must know：________we live can we save the earth.
| A．by changing the way only |
| B．only by changing the way |
| C．by only changing the way |
| D．by changing only the way |
—Can those________at the back of the classroom hear me?
—No problem.
| A．seat | B．sit |
| C．seated | D．sat |
Attracting _____ senior citizens, Florida is _____ home to the largest population of elder Americans.
| A．不填; 不填 | B．the; the | C．the; 不填 | D．不填; a |
—Bob feels really sorry, Jean.
— ______ I wouldn’t accept his excuses unless he takes back what he said.
| A．What for? | B．So what? | C．No doubt. | D．No wonder. |
These reference books donated by a non-profitable organization are available for ____ wants to have it.
| A．anyone | B．someone | C．who | D．whoever |