I wasn’t aware of this before, but recent research _____ that eating too much fat can contribute to heart disease.
| A．has shown | B．will show | C．was showing | D．showed |
How pleased the detective was _____ what his customer told him!
| A．hearing | B．heard | C．to hearing | D．to hear |
Mrs. Brown was much disappointed to see the washing machine she had _____ went wrong again.
| A．it repaired | B．to be repaired | C．to repair | D．repaired |
-Has Tommy finished his homework yet?
-I have no idea; he ____ it this morning.
| A．was doing | B．had been doing | C．has done | D．did |
-If you have time tonight，I’d like to invite you to a ball.
-That’s very nice of you，but are you ____?
| A．free | B．careful | C．serious | D．true |
-You couldn’t have chosen any gift better for me.
-______.
| A．Oh，I’d choose a better one for you next time. |
| B．You’ve had a gift for music，haven’t you? |
| C．I’m glad that you like it so much. |
| D．Sorry，but don’t blame me，dear. |