11．（8分）A big part of the Pacific Ocean is suffering from a huge sea of plastic garbage， which some scientists think is as large as the United States， but almost no one noticed it until 1997．
Charles Moore was the captain of a sailboat that had just completed a race． He planned to sail home from Hawaii to California． He didn't follow the usual route to the south， and then east， but sailed directly east 一 a slower route with weak winds and few visitors． So Moore was sailing into almost unknown waters．
To his shock， Moore found a "soup" of plastic garbage under the ocean's surface． Everyday plastic garbage， such as shopping bags and water bottles， were trapped among the tiny pieces． The sea of garbage reached out as far as Moore could see．
Oceanographers（海洋学家）are not surprised that garbage collects in the North Pacific． A pattern of winds and currents， called the North Pacific Gyre， gathers this garbage． Water in the gyre goes round and round in a clockwise pattern（顺时针方向），and anything that gets into the middle of it is trapped．
Some oceanographers have questions to Moore． Why didn't satellite pictures show the area？ Where did all this plastic come from？ Is it really a problem？ Moore learned some answers during return trips to the Great Pacific Garbage Patch． Satellites don't see the plastic because most of it is hidden under the ocean's surface． Some of the plastic comes from ships， but most of it is washed into the ocean from cities beside the Pacific．
The Great Pacific Garbage Patch is a real problem because the plastic in it is harmful to animals． Once fish and birds eat the plastic， poisonous chemicals will get into their bodies and make them sick or even kill them．
（1）When did Charles Moore find the Great Pacific Garbage Patch？
A． On his way home．
B． During one of his races．
C． While doing an oceanic survey．
D． After coming across bad weather．
（2）The plastic garbage is gathered in the North Pacific by ．
A． sea animals．
B． business ships．
C． oceanographers．
D． great winds and currents．
（3）What can be a question some oceanographers ask about Moore's report？
A．Why didn't Moore report earlier？
B．What harm can the garbage do？
C． What use can be made of the garbage？
D． Why is the garbage under the water？
（4）What might be the best title of the text？
A． An ocean of plastic．
B．A great discovery．
C． The sources of ocean pollution．
D． The mysteries of the ocean system．
