下列设备中，（）不可用于采集数字图像。
A.录音笔
B.数码相机
C.扫描仪
D.摄像头
参考答案：A
My mother is a teacher. She goes to work ____ 7:00 ____ the morning. [ ]
A. at…on
B. at…at
C. at…in
—I am sorry I _______ my exercise book at home.
— Don’t forget _______ it to school tomorrow.
A．forget; to take
B．left; to bring
C．forgot; to bring
D．left; to take
