He is a poorly learned man, but he acts as if he ______.

The boy insisted that he ＿＿ old enough, and ＿＿ the right to make his own choice.

---Will Tony come to the party tonight? ---I’m not sure. He _______stay at home preparing for the coming exam.

I was on the highway when this car went past followed by a police car. They ______ at least 150 kilometers an hour.

—What a pity! Their experiment is a failure.—They ________ better under more favorable conditions.