The view ____ many scientists hold is ____ too much emission of carbon dioxide is destructive.
| A．what; that | B．that; which | C．that; that | D．which; which |
After the summer vacation, the professor, together with his fellow teachers, ______ the scientific experiment
| A．goes down | B．go down | C．gets down to | D．get down to |
I never doubt ________ he was dedicated to our firm.
| A．that | B．whether | C．if | D．what |
—How many students passed the math test?
— ________, for it was too much for them.
| A．Nobody | B．A few | C．None | D．No one |
—what do you think of the matter?
—Don’t you remember I have already ________ that it was troublesome?
| A．made it clear | B．made clear | C．took it for granted | D．made sure |
As a result of destroying the forest, a large ________ of desert ________ covered the land.
| A．number; has | B．quantity; has | C．number; have | D．quantity; have |