1 . ________ the vast knowledge that we have accumulated, there are still many unsolved natural mysteries out there.

A．But

B．Despite

C．Instead of

D．Within

3 . These general rules of first aid can ______ which ever kind of emergency.

A．apply to

B．refer to

C．contribute to

D．turn to

4 . There is no doubt that being honest is________ the country and the individual.

A．in account with

B．for the benefit of

C．at the expense of

D．by way of

5 . In order to complete the two temporary hospitals as soon as possible, the workers worked day and night for ten days________.

A．in a row

B．in shape

C．on business

D．on the increase

7 . Several species of giant tortoise ______ the Galapago Islands.

A．are native to

B．is native to

C．is home to

D．are home to

8 . Single women were allowed to take part in their own competition in ancient Olympic Games, at a separate festival _______ Hera, the wife of the Greek god Zeus.

A．in favor of

B．in honor of

C．in charge of

D．in search of

9 . After a day of activities, you should be ________ a good meal.

A．in the mood for

B．at the point of

C．on the edge of

D．with the help of