___ Mary, you would not be able to recognize her.

The water will be much more polluted unless some measures______ right now.

It can be inferred from the passage that （ ）.

没过多久，房子外面就聚集了很多人。

By the middle of the 21st century, the vast majority of the world’s people____ in cities rather than in rural areas.

I （ ） along the Great Wall for hours when I saw her.

More and more people today ______.

I have heard a lot about him ___ I came back from abroad.

According to Mrs. Brown, the purpose of teaching her children at home is （ ）.

57.（）

66.（）

The underlined sentence “ Both students hang on until about mid-term”( Para.1 ) tells us that ___?