I’ll get Bill to accompany me the piano when I sing a song at the concert.
| A．at |
B．with . |
C．to |
D．by |
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
| A．that | B．as | C．so that | D．which |
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 |