Police were sent out to keep the traffic ________ smoothly during the snowstorm.
| A．being run | B．run | C．to run | D．running |
The government placed _____ on the numbers of foreign cars that could be imported.
| A．limitations | B．restraint |
| C．requirements | D．restrictions |
. He ate what he could, and gave the _____ of the food to the birds.
| A．remain | B．uneaten | C．rest | D．part |
. Mary had taken _____ to see that her guests had everything that they could possibly want.
| A．efforts | B．pains | C．attempts | D．endeavors |
. It isn't so much whether he works hard; the question is whether he works _____.
| A．above all | B．in all | C．at all | D．after all |
Expected noises are usually more _____ than unexpected ones of the like magnitude.
| A．manageable | B．controllable |
| C．tolerable | D．perceivable |