tailieunhanh - Đề thi học sinh giỏi môn Anh (Cần Thơ)

Đề thi học sinh giỏi môn Anh (Cần Thơ) gồm có 140 câu trắc nghiệm Anh văn. Đây là tài liệu ôn tập hữu ích, giúp cho các bạn học sinh có thể trau dồi thêm kiến thức tiếng Anh, rèn luyện làm bài tập trắc nghiệm tiếng Anh. Mời tham khảo. | Most people are afraid from sharks, but they usually do not know very much about them. For example, there are 350 kinds of sharks, and all of them are eaters meat. Some sharks are very big. The whale shark is 50 and 60 feet long. But some sharks are very small. The dwarf shark is only 6 inches long. Sharks are 100 million year old. In fact, they lived at the same time with dinosaurs. Today, sharks live in every ocean in the world, but most sharks live in warm water. They keep the oceans cleaning because they eat sick fish and animals. Most sharks have four to six lines of teeth. When a sharks tooth falls out another tooth move in from before. Sharks do not have ears. However, they "hear" sounds and movements in the water. Any sound or movement causes the water vibrate. Sharks can feel these vibrations and they help the sharks find food. Sharks use their large eyes to find food, too. Most sharks see wellest in low light. They often hunt for food at dawn, in the evening, or in the middle of the night. Scientists want to learn more about sharks for several reasons. For example , cancer is common in many animals, including people. However, it is rare in sharks. Scientists want to find out what sharks almost never get cancer. Maybe this information can help people prevent cancer too.