阅读下面短文，掌握其大意，然后从21—30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。
One Sunday, Cody decided to go sailing in his boat with his friends Dane, but Dane happened to be away. Dane’s brother Brett wanted to go instead he did not know anything about sailing. Cody
and they set out to sea.
Soon theythemselves in a thick fog(雾). Cody was sure they would be hit by a big ship. Luckily he saw a large buoy（浮标）
the fog and decided to tie the boat to it for
. As he was getting onto the buoy, however, he dropped the wet rope. The boat moved away in the fog carrying Brett who did not know
to use the radio. He drifted（漂流） about and was not seen until twelve hours later.
Cody the night on the buoy. In the early morning he fell asleep and was having a bad
when a shout woke him up. A ship, called Good Hope, came up and he climbed onto it and thanked the captain. The captain told him that Brett had been picked up by
ship and the ship’s captain had sent out a
.
从A、B、C、D四个选项中选择能填入空白处的正确答案，并将其字母代号填入答题卷相应空格内。
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------How are you getting on with your roommates?
--------______. I’ve got to know them all.
| A．Far better | B．Much pleased | C．Very comfortable | D．Very good |
To their great relief, the lost child went back home, ______, after an absence of two weeks.
| A．felt tired and sound | B．tiring and soundly |
| C．feeling tired but soundly | D．tired but sound |
-----Have our working conditions improved?
---No, ______than before, I’m afraid.
| A．no better | B．a little better | C．not worse | D．no worse |
The task is too much for him, so he can’t continue ______any longer. He must get some help.
| A．singly | B．simply | C．alone | D．lonely |
I haven’t seen______ this since I collected stamps.
| A．as beautiful a stamp as | B．so anbeautiful stamp as |
| C．stamp as beautiful as | D．as anbeautiful stamp a |