while___the book,he noddded from time to time.A read B he re

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while___the book,he noddded from time to time.A read B he reads C reading D reads
为什么?

C 当主语一致,且有连词,可省略主语与be动词.主语he与reading为主动关系,所以填reading
再问：为什么read要加 ing
再答：因为省略了be动词，原句相当于while he was reading the book,he noddded from time to time
再问：为什么是reading而不是别的谢谢
再答：如果没有he，需用ing形式，AD不对，如果选B，应该是while he was reading the book,he noddded from time to time。while引导从句一般用进行时。

while___the book,he noddded from time to time.A read B he re He has read the book twice but he wants to read 空 third time what time does Tom read a book?He reads a book at 11o'clock He continued to play the piano from time to time. He sat at the table,___ a new magazine A to read B read C re He hurried home,looking behind from time to time. （） Please finish ———— the book on time.A.to read B.reading He read a book .对吗? Before he came,I,d finished____the whole book.A to read B to He looked behind from time to time ____ he were being follow 英语翻译10.(A) He prefers to work part time.(B) He wants to chan He enjoy ——English book.A.to read B.reading