用所给词的适当形式填空

1. There ______ (be) a picture on the wall.

2. Are there ______(some) teachers in the classroom?

3. There ______(be) two pencils and a pen on the desk.

4. In the classroom,  there ______ (be) ten students and a teacher.

5. There aren't any ______ (apple) in the box.

具有多媒体功能的微型计算机系统中，常用的CD-ROM是(

A．只读型光盘

B．半导体只读存储器

C．只读型硬盘

D．只读型大容量软盘