74. The policemen all said that their ______ helped them a lot.

73. Here is a ______ mouse. Was it killed by your cat?

72. Cathy often goes ______ with her friends in winter.

71. Don't stop your taxi here, driver. Look at the sign. It says "No ______".

B)根据句意找出合适的单词，并用其适当形式填入句中，每词限用一次。

70. I'm going to send an e-mail, but there's something wrong with the mouse of my ______.

69. -- How many students are there in your school?　 -- Seven hundred and ______(八十).

68. When did Mr. Smith and his friends ______(到达) in China?

A)根据汉语或句意，写出句中所缺单词。

67. Nantong is ______(著名) for its Haohe River with a lot of trees around.