【推荐2】Their use was limited by laws, the first of ________ dates back to the fourteenth century.

A．where

B．which

C．that

D．when

【推荐3】Tourism, _______ it brings in money to a country, can also result in damage to the World
Heritage sites there.

A．once

B．while

C．if

D．as

【推荐1】Tu Youyou was awarded the Nobel Prize, ________ is considered one of the highest international honours a person can receive.

A．that

B．what

C．which

D．where

【推荐2】Celia won first place in the maths competition, ____ made her parents proud.

A．which

B．when

C．who

D．that

【推荐3】The “new” Japanese prime Minister Shinzo Abe wants the USA to promise _________ Japan declares war against China, the USA will give military aid, __________ promises to be impossible.

A．if; which	B．whether; it
C．if; that	D．when; it