29. New ways _____ to prevent the river _____.
| A．have found out, from polluting |
| B．have found, from being polluted |
| C．have been found out, from being polluted |
| D．have been found, from being polluted |
____ from the moon, our earth with water ____ seventy percent of its surface, appears as a blue ball.
| A．Seen; covered | B．Seeing; covering | C．Seen; covering | D．Seeing; covered |
Mrs. Taylor has ____ 8-year-old daughter who has ____ gift for painting. She has won two national prizes.
| A．an; a | B．an; the | C．a; a | D．the; a |
-- Goodbye, Peter, remember me to your parents. -- _________.
| A．It’s very kind of you to say so. | B．Thanks, I will. |
| C．You are so kind. | D．Thanks, what a good idea. |
If people eat natural poisons by mistake, they ________ go to hospital without delay.
| A．would | B．can | C．may | D．must |
Before us lies the biggest room, ________with things like guns, dolls and old clothes.
| A．filling | B．filled |
| C．being filled | D．having been filled |