Stephen Hawking believes that the earth is unlikely to be the only planet_______life has developed gradually.
| A．that | B．where | C．which | D．whose |
I didn’t have to work all weekend — I did it by _______.
| A．chance | B．choice |
| C．accident | D．myself |
Shelly had prepared carefully for her English examination so that she could be sure of passing it on her first ________.
| A．intention | B．attempt |
| C．purpose | D．desire |
—Hi, this way, please.
—OK.I sometimes have no sense of ______ when I arrive at the crossroad.
| A．position | B．direction |
| C．situation | D．condition |
Ten years had passed. I found she had _______.
| A．a few white hairs | B．a little white hair |
| C．some white hair | D．more fifty hair |
____ is a good form of exercise for both young and old.
| A．Walk | B．Walking |
| C．The walk | D．To walk |