this is a clock.（就划线部分提问）—— ——?

this is a clock.（就划线部分提问）—— ——? This is a pen.就划线提问 Is this a clock?回答 It is eight o clock,就划线部分提问,划线部分是 eight o clock This is a clock in English 对a clock提问 this is a clock变成一般疑问句 This is a clock改为否定句 That is a white clock.对划线部分提问 this is a White key （就划线部分提问）---------------------- ------- this? This is X.就划线部分提问(划线部分：x) 就划线部分提问Miss white is going to have a party 就划线部分提问(this evening ) This,is,(some,water)(就划线部分提问)()this? The clock is a circle (对划线部分提问)circle 划线 This is a clock.(改为一般疑问句） This is a clock.用whach 改为选择疑问句 This is a clock.(改为一般疑问句)怎样做 This is a alarm clock 这个句子哪里错了?.. this is an a（ ） clock 如何填空?