I'll trade you my stamp collection _______your model boat.
| A．with |
| B．for |
| C．to |
| D．into |
The foreigners from _______ United States paid _______ visit to the Bird Nest Stadium last week.
| A．/; the | B．/; a | C．the; a | D．the; / |
It is reported that a series of meetings _____ held about the best way to market the new product.
| A．was | B．were | C．has | D．have |
When the bell rang announcing the end of class, students came out _____.
| A．by twos and threes | B．by two and three |
| C．by two and three | D．by twos or threes |
His father has made a _____ bench for him.
| A．four legged | B．four-leg | C．four-legged | D．four legs |
More than _____ of the workers _____ from Paris.
| A．ten percent, is | B．ten percent, are |
| C．three times, was | D．percent ten, comes |