The graduating students are busy _______ material for their reports.
|
A．collect |
B．to collect |
C．collected |
D．collecting |
I had to shout to make myself _______ above the noise.
|
A．heard |
B．hearing |
C．heard |
D．to hear |
.He walked down the hills, _______ softly to himself.
|
A．sing |
B．singing |
C．sung |
D．to sing |
.At this moment the bell rang _______ the end of class.
|
A．announce |
B．announcing |
C．announced |
D．to announce |
The child sat in the dentist's chair _______.
|
A．tremble |
B．trembling |
C．trembled |
D．to trembled |
Properly _______ with numbers, the books can be easily found.
|
A．marked |
B．mark |
C．to mark |
D．marking |
