I think ______ is necessary ______ us to do something useful to protect the birds.
| A．this; for | B．it; of | C．this; of | D．it;for |
The shoes ________ that he ________ at last.
| A．cost so expensive; gave them away | B．took too much; gave them up |
| C．took such little; gave them out | D．cost so much; gave them up |
—Lucy hardly goes back to see her parents, _____________?
—__________. Instead, she chooses to write to them.
| A．doesn’t she; No | B．does she; Yes | C．doesn’t she; Yes | D．does she; No |
—What do you think of genetically modified food (转基因食品)?
—We all think ______ is careless ______ some scientists to say it is safe before doing any experiment.
| A．that, for | B．it, for | C．it, of | D．that, of |
—Daddy, do you believe I can swim ______ to catch up with Ben!
—Great, dear! But I don’t have ______ to watch your match. I hope to hear your good news.
| A．fast enough, time enough | B．enough fast, enough time |
| C．enough fast, time enough | D．fast enough, enough time |
It’s careless _____ him to make the same mistake again. I think it important ______ everyone to be careful in everything.
| A．to; for | B．for; of | C．of; to | D．of; for |