This is a clock.(改为一般疑问句)

This is a clock.(改为一般疑问句) This is a clock.(改为一般疑问句） this is a clock变成一般疑问句 1.This is my ring.(改为一般疑问句)（ ）（ ）（ ）ring?2.It is a clock.(改为 That is a nice clock.改为一般疑问句 This is a boy.改为一般疑问句 This is a computer.(改为一般疑问句) This is a ruler 改为一般疑问句 This is a ruler改为一般疑问句 This is a desk.(改为一般疑问句) This is a key改为一般疑问句? This is a pen.改为一般疑问句