________ his strength failed and he dropped behind in the race.
| A．Quietly | B．Actually |
| C．Practically | D．Gradually |
You needn’t go to the railway station by taxi because it is within walking ________.It only takes five minutes to walk there.
| A．touch | B．distance | C．speed | D．reach |
The professor ________at 8 o’clock，but he has not shown up yet，which worries all of us.
| A．was supposed to arrive | B．must have arrived |
| C．might have arrived | D．was supposed arriving |
The manager was concerned to hear that two of his trusted workers ______.
| A．will leave | B．are leaving | C．have left | D．were leaving |
He got himself into a difficult situation ________he must make a final decision all by himself.
| A．which | B．what | C．when | D．where |
I bought my younger sister a toy with my pocket money，________that is cheap but beautiful.
| A．one | B．the one | C．this | D．that |