27、1．I won't be able to finish the housework without your help．（改為同義句，以下同）

  1 won't be able to finish the housework                         you                       help me．

2．I'm glad that my grandfather is healthy now．

  I'm glad that my grandfather is in                                                    now．

3． Work hard, or you will fall behind others．

                           you                       work hard，you will fall behind others．

4．1 am not sure what I can buy for my mother．

  I am not sure what                          for my mother．

5．如果你上學(xué)遲到了，老師將不讓你進(jìn)去。（完成翻譯句子；以下同）

                          you are late for school, the teacher                            let you in．

6．那時(shí)她靠在街上賣報(bào)紙謀生．

  She                          a                           by selling newspapers in the street in those days．

7．昨天我和同學(xué)爭吵起來，事后我感到很后悔。

  I             my classmate yesterday．After that I felt very sorry．

8．課后我們應(yīng)多講英語。

  We should speak English as                     as                         after class．

9．你不應(yīng)該在閱覽室里吸煙。

You                                                           to smoke in the reading-room．

10．請把書拿去給他并把詞典給我?guī)�來�?/p>

Please                       the book to him and                            the dictionary to me．