he longest river in Canada is（）.

We shall（）some ports in Canada.

Britain’s longest rivers are（）.

In a four stroke engine, which process lasts the longest period?（）

The longest river in Canada is（）

Canada is located in（）.

The river （） to the east. It is the second longest river in the country.

The longest river in New Zealand is（）

In the experiments, ______ lives longest.

Man has been polluting the earth from the time he first made fire, washed his clothes in the river and threw his waste on the ground. When land was used up or water became (1) , man moved on to another place.

Mother Volga, the national symbol of Russia and longest river in Europe, rises northwest of Moscow and flows into the __________.

2. English ____ in Canada.

English ____ in Canada.

We didn't expect him to______. We thought he was in Canada.

听力原文：Canada's Olympic 100-meter Champion Donovan Bailey showed he was on his way back

Which one is the oldest city in Canada？

Which river is（)longest,the Nile, the Amazon, or the Mississippi？

Father was not in Canada.

The color and smell of water in these rivers_____itself how serious the pollution is but many people are still ignoring he fact.

The River______is the longest river in Britain.

______is the longest river in the U.S.A.

The U.S.war in Afghanistan was the longest war in American History.（)

Xuan Zang, a famous monk in the Tang dynasty, went west in 627 to seek dharma. He traveled all over the Ganges River and the Indus valley, and visited more than 110 countries. After returning to China

If he ___________（） in finding the place in Canada, he will call you as soon as possible.

___Yangtze River is one of ____longest rivers in ______world.