句型51：be+num. +metres / kilometres / years...+long / wide / deep / high / old...
The Great Green Wall is 7，000 kilometres long.
The river is about 2 metres deep.
The boy is about 12 years old .
句型52：keep ... from doing
The heavy rain kept us from starting out.
句型53：with one’s help...
With Tom’s help，I’ve come to America to study further.
句型54：I don’t think ...
I don’t think any of them is interesting.
句型55：What’s the population of ...?
What’s the population of Germany ?
句型56：prefer to do … rather than do
They prefer to buy a new one rather than repair it.
句型57：be worth (doing) …
This book is worth reading.
句型58：regard … as...
They regarded their pets as members of their families.
句型59：be confident of
I’m confident of success.
句型60：be angry with / about / at(doing)
We’re all very angry with ourselves.
I was angry about his decision to build a factory here.
I was angry at being kept waiting.