the computer operation test,onr is supposed to say at his own machine,题在下方At the computer operation test,onr is supposed to say at his own machine,keep his eyes on his screen,____to anyone.A.and not to speak B.but could not speak C.instead of

the computer operation test,onr is supposed to say at his own machine,题在下方At the computer operation test,onr is supposed to say at his own machine,keep his eyes on his screen,____to anyone.A.and not to speak B.but could not speak C.instead of
the computer operation test,onr is supposed to say at his own machine,题在下方
At the computer operation test,onr is supposed to say at his own machine,keep his eyes on his screen,____to anyone.
A.and not to speak B.but could not speak C.instead of speaking D.or rather speak
有大哥大姐会这道题么

the computer operation test,onr is supposed to say at his own machine,题在下方At the computer operation test,onr is supposed to say at his own machine,keep his eyes on his screen,____to anyone.A.and not to speak B.but could not speak C.instead of
At the computer operation test,one is supposed to stay at his own machine,keep his eyes on his screen,___to anyone.
A.and not to speak B.but could not speak
C.instead of speaking D.or rather speak
答：A
译：计算机考试时,考生应坐在自己的电脑前,眼睛看着自己的显示屏,不跟任何人说话.
析：本句考并列连词.is supposed to do A,do B and （not to） do C.
B项如果没有这个could也可以：is supposed to do A,do B ,but not do C.
D项凑数项,不用考虑.
C项有很大的干扰性.instead of doing sth.而不是.
但是,前面要用and ：is supposed to do A and do B instead of doing C.
评：为增加试题难度,造出了不是很通顺的题句.三个并列不定式,应共用一个to:to do A,do B and do C.但这里的A项中有to (但似乎不能少!）
其实B项和C项的话,如果to do A 和do be之间用一个连词and的话,也成立：
B---At the computer operation test,one is supposed to stay at his own machine and keep his eyes on his screen ,but could not speak to anyone.but 并列两个位语,共同的主语是one,其中is supposed to =should,只是这个could用过去时态（表示虚拟语气?）不是很好.应用can not ...
C---At the computer operation test,one is supposed to stay at his own machine and keep his eyes on his screen instead of speaking to anyone.应该A和B,而不是C

答案是A.
句型：sb. is supposed to do sth.
sb. is supposed not to do sth.
这道题前后考的就是这两个句型。

A，B的话前面没有不能说话前提，C和D的话应该没有逗号，所以排除之后A是最合理的
望及时采纳

选C
在机考操作时，每个人都应该在自己的电脑上“说话”而不是和别人说话。
instead of doing 而不是

A 从后面的keep his eyes on his sceen,保持你的眼睛在自己的屏幕上，并且不能和他人说话。
从语气的表达，这里没有转折，所以不能用but，C，D不符合逻辑 固选A

选A
选项与前面的可以在同一时间内完成，属于并列动作，直接选and not to speak 就行了

选C

C instead of是代替的意思，of 是介词，后接动词的ing 型。

A吧

A
都是跟在be supposed to 后面的并列动作。

A，say......;keep.....;speak....是并列的动作

D

A

C

a be supposed not to do 不应该干什么····

A