97. I usually spend two hours 　　▲　　 　(walk) in the park at the weekend.

96. My computer is broken, I 　　▲　　 　(ask) a computer engineer to check it tomorrow.

95. We should be careful when we walk 　　▲　　 　(cross) the street.

A2. 用所给动词的适当形式填空。（5分）

94. Vegetables and fruit are 　　▲　　 　(health) food for us.

93. There are three　　 ▲　　 　(knife) in my kitchen.

92. His father and uncle work in the post office, they are both 　　▲　　 　(postman).

91. My family live on the 　　▲　　 　(nine) floor of that tall building.

90. People often meet at the community centre and share their 　　▲　　 　(技能) .

89. Simon is 　　▲　　 　(幸运的) to live in a good neighbourhood.

88. When I go to the park, my pet dog often 　　▲　　 　(跟随) me.