All possible means ________been taken to prevent the river________．
| A．have;polluting |
| B．has; polluted |
| C．has; from polluted |
| D．have;being polluted |
相关试题
The researchers found clear and convincing evidence ________ happiness is the key when it comes to better health and longer lives.
| A．where | B．whether | C．how | D．that |
—What is the result of the survey?
—15% of those surveyed worry that in the long term children ________ be more dependent on their parents, which does no good to them.
| A．should | B．can | C．may | D．shall |
Freedomloving young students dislike being restricted by rules, especially ________ which are “outdated” in their eyes.
| A．the one | B．those | C．ones | D．anything |
—How anxious Ruby is! I wonder what on earth she ________.
—I'm afraid nobody knows. She is always so strange.
A．has expec ted |
B．will expect | C．will have expected | D．is expecting |
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