杭州交通信息网2007反卫星:______,make a pause where there is a full stop.
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______,make a pause where there is a full stop.
A.while you read B.when read
C.while read D.when the book is read
A.while you read B.when read
C.while read D.when the book is read
A.这句话的主句make a pause where there is a full stop是个祈使句，主语为you,一般省略。
本题的考点是省略。当主句和从句的主语一致时，从句可以采用省略的形式。
B是错误的，将该项中省略的词补充出来为When you are read, make a pause where there is a full stop.当然这是病句。
本题A项中，从句while you read 的主语you和主句的主语you一致，可以省略，故答案也可以是while reading.
A
BC缺少主语 或者如果不要主语read必须改为reading
D的话主语不一致
b
a
A