Three-fourths of the surface of the earth＿＿＿sea．
| A．is | B．are | C．were | D．has been |
He sat at the desk, __________ a novel.
| A．read | B．to read | C．reading | D．reads |
— Anything new in the new regulations? — They will be ________ to us all.
| A．of great benefit | B．do harms | C．do many good | D．for the benefit |
Don’t be angry with the boy. He made the mistake ______.
| A．on purpose | B．by accident | C．in surprise | D．at once |
Bob ran the 100 meters in 9.91 seconds, and I have not seen ________ this year.
| A．the best | B．better | C．the most | D．more |
our article is too long. You must _______ to about 3000 words.
| A．cut it off | B．cut it up | C．cut it down | D．cut it into |