句型转换，根据要求完成句子。

1. To work in a school is very interesting. (同义句)

    ______ ______ very interesting to work in a school.

2. Don't worry too much about your exam. (同义句)

    Don't ______ ______ too much about your exam.

3. We maybe make our friends and family unhappy. (对画线部分提问) 

    ______ ______ you maybe make your friends and family?

4. The headmaster saw the children playing on the playground. (变成复合句)

    The headmaster saw the children ______ ______ on the playground.

5. Did he come up with a great idea? (同义句)

   ______ he ______ a great idea?

In every cultivated language there are two great classes of words which, taken together, comprises the whole vocabulary. First, there are those words (1) which we become acquainted in daily conversation, which we (2) , that is to say, from the (3) of our own family and from our familiar associates, and (4) we should know and use (5) we could not read or write. They (6) the common things of life, and are the stock in trade of all who (7) the language. Such words may be called "popular", since they belong to the people (8) and are not the exclusive (9) of a limited class.

On the other hand, our language (10) a multitude of words which are comparatively (11) used in ordinary conversation. Their meanings are known to every educated person, but there is little (12) to use them at home or in the market-place. Our (13) acquaintance with them comes not from our mother’s (14) or from the talk of our school-mates, (15) from books that we read, lectures that we (16) , or the more (17) conversation of highly educated speakers who are discussing some particular (18) in a style appropriately elevated above the habitual (19) of everyday life. Such words are called "learned", and the (20) between them and the "popular" words is of great importance to a right understanding of linguistic process.

12（）

A.prospect

B.way

C.reason

D.necessity