问题描述：
1.Five f( ) were shown around their school last sunday.
2.Li Lei went into the library and found Miss Zhao c( ) a book.
3.There is a railway b( ) the two cities.
4.Jim isn't old enough to d( ) himself
2.Li Lei went into the library and found Miss Zhao c( ) a book.
3.There is a railway b( ) the two cities.
4.Jim isn't old enough to d( ) himself
问题解答：
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