A．a numberB．an amountC．tile numberD．most

A、Nunber off

B、Off number

C、Count off

D、Count number

In which of the following ways do the refugees threaten the survival of such wild animals as the snow leopards?

A．They hunt the animals for food.

B．They fight in the rugged mountains that provide a haven for the animals.

C．They hunt the animals to make profits.

D．They drive the animals away from their homes in the mountains.

Why should anyone want to read ______ of books by great authors when the real pleasure comes from reading the originals.

A．themes

B．insights

C．digests

D．leaflets

Anxiety is believed to ______ diabetes by raising levels of the stress hormone cortisol which regulates insulin and blood-sugar levels.

A．impede

B．exacerbate

C．inherit

D．facilitate

When the man in park saw the writer, the man ______ .

A．begged some money from him

B．tried to hit him

C．offered to help him

D．walked away from him

What seems confusing and fragmented at first might well become ______ a third time.

A．clean and measurable

B．notable and systematic

C．pure and wholesome

D．clear and organic

The tone of the passage can best be described as ______.

A．confident and optimistic

B．scientific and detached

C．discouraged and alarmed

D．polite and sensitive