填空题
多一个词：把多余的词用横线(—)划掉，在该行右边横线上写出该词，并也用横线划掉。
缺一个词：在缺词处加一个漏字符号(∧)，在该行右边横线上写出该加的词。
错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
One Sunday, Mark decided to went sailing with Dan, but Dan 82. ______.
happened to be away. Dan's brother John offered to go in stead 83. ______.
though he knew nothing about sailing. Mark agrees and they 84. ______.
set out to sea. 85. ______.
Soon they found them in a thick fog. Fortunately Mark saw a 86. ______.
large buoy(浮标) and decided to tie the boat to it with safety. As 87. ______.
he was getting onto the buoy, however, he dropped a rope. 88. ______.
The boat moved away carry John, who did not know 89. ______.
how to use the radio. He drifted(漂流) about and 90. ______.
was not seen till twelve hours later. 91. ______.