—Robert is indeed a wise man.
—Oh，yes.How often I have regretted ______ his advice!
| A．to take | B．taking | C．not to take | D．not taking |
There is a peaceful and calm _____ in the country, quite different from that of a big city.
| A．climate | B．atmosphere | C．system | D．situation |
Jack was in low spirits those days and his friends did all they could _____ him up.
| A．cheer | B．cheering | C．cheered | D．to cheer |
See the model ship ____in the pool? That’s what my father made for me last weekend.
| A．float | B．floating | C．floated | D．to float |
Though I was tired out that evening, I _____ from falling asleep by the great pain in my knee.
| A．was prevented | B．had prevented | C．has prevented | D．am prevented |
Simon was _____ why many of his friends didn’t turn up at his birthday party.
| A．limited | B．crashed | C．spotted | D．puzzled |