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have conducted have been conducted had conducted had been conducted
A severe earthquake and the Second World War. The foreign occupation(占领) after the war. The population explosion(爆炸) between1945 and 1960. The rapid development of the city after the war.
The author’s father built a bonfire on VE Day. The author’s father had fought in the First World War. The author’s father had fought in the Second World War. The author’s father threw two chairs on the fire to keep it going.
The author’s father built a bonfire on VE Day. The author’s father had fought in the First World War. The author’s father had fought in the Second World War. The author’s father threw two chairs on the fire to keep it goin
5 percent of the world' s water 15 percent of the world' s water 20 percent of the world' s water 50 percent of the world' s water
have conducted have been conducted had conducted had been conducted
have conducted have been conducted had conducted had been conducted
Though the situation is not urgent, we should press forward with our marine research, Nations throughout the world must be provided with fish, fresh or frozen, for needed protein. There are enough fish in the U.S. seas to allow for the annual protein needs of a quarter of the world's 5 billion people. The oceans are the major source of the world's protein supply.
have conducted have been conducted had conducted had been conducted
During the First World War. During the Second World War. During the Civil War. During the Gulf War.
The author's father built a bonfire on VE Day. The author's father had fought in the First World. War. The author's father had fought in the Second World War. The author's father threw two chairs on the fire to keep it going.
the atmosphere has a lot of water in it when it circulates the water in the atmosphere is purer than that in the world's oceans the amount of water in the atmosphere is greater than that in the oceans in the world the small amount of water in the atmosphere plays an important role in the yearly rainfall
the Second World War World War Second World War 2th the World War 2
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