71. Sometimes we find her _______ (drive) the tractor on the farm.

　　72. Li Lei is asking his uncle, an English teacher, _______(help) him think of a foreign name.

　　73. --- Hi! Li Hong. I didn’t see you at the party.

　　--- Oh, I was busy _______(get) ready for the coming exams.

　　74. The old men enjoy _______(listen) to the singing of the birds in the park.

　　75. The girl _______(stand) under the tree is my cousin Kate.

　　76. Books _______ (write) in easy English are very popular among Chinese middle school students.

　　77. Why did you keep your brother _______ (wait) for a long time that evening?

　　78. I found the door _______(close) when I got home.

　　79. When they met again, they were too excited _______(say) a word.

　　80. Through the window, I saw some boys _______(play) basketball.