My stomach ______ me. I thought it was going away, but now it’s getting worse and worse.

---- You look tired.
---- Yeah, I ________ since 4 o’clock.

The professor kept telling us that the future _____ to the well-educated and I kept wondering
where I _____ of it.

At 4:00 next Friday, I ________TV in my room.

The monitor suggested that we ______ for a picnic on Sunday.

I am too tired. I _____ my homework all morning.
A have been doing         B did        C do        D have done

By the time my parents reached home yesterday, I _____ the dinner already.

The Food and Drug Administration      that anyone who      too much the drug
suffer side effects.

In the past 5 years a great deal of money _____ improving the environment of the school.

How long ______ teaching? Forty years.