第一节 短文改错
此题要求改正所给短文中的错。对标有号的每一行作出判断；如无错误，在该行右边横线上面一个勾(√)；如有错误(每行最多只有一个错误)，
则按下列情况改正： 多一词：把多作的词用斜线(\)划掉，在该行右边横线上写出该词，并也用斜线划掉。
缺一词：在缺词处加一个字符号(∧)，在该行右边横线上写出该加的词。
错一词：在错的词下划一横线，在该行右边横线上写出改正后的词。 Early men did not have
clocks. They were told time by the 76. ______ sun and shadows of
trees. At first time, they used 77. ______ sticks
placing in the ground instead of trees. They made 78.
______ marks in the ground, and the shadows from the sticks told
79. ______ the time of day. Later, men began to use sundials. Some of
80. ______ sundials were boxes with sticks cast a shadow. Men
were 81. ______ able to take the sundial box with them. The mark
for noon 82. ______ was very important. The sundials always have
to face the same 83. ______ way or the time was wrong. Sundials
were good only on sunny 84. ______ days, not on cloud days.
They were the first kind of clock. 85. ______