I was about to sail away ______ I heard the sound of stamping and singing on the bank,
| A．when | B．while | C．as | D．the instant |
_____, the subject was always in my mind.
| A．Walking or sleeping | B．Walking or slept |
| C．Having walked or slept | D．To walk and sleep |
As I will be away for at least a year, I’d appreciate _____ from you now and then so that I can know how everyone is getting along.
| A．having heard | B．to hear | C．hearing | D．being heard |
The program was so exciting that the children kept their eyes _____ on the screen.
| A．to fix | B．to be fixed | C．fixed | D．fixing |
The thief fell to the ground, his left foot _____ and blood _____ down from his mouth.
| A．breaking; running | B．broken; running |
| C．breaking; run | D．broken; run |
The monument was built in honor of the explorer who was believed _____ the river.
| A．to have discovered | B．to have been discovered |
| C．to discover | D．having been discovered |