He is still keeping the record_____ swimming

He is still keeping the record_____ swimming he is swimming across the river改错 He is swimming in the sea. he is go swimming He is swimming in the sea.对 in the se look!he is ____ the river A.swimming across B.swimming throu he is still here Tom is ____ keeping a dog in the house,because he thinks it The man is very old,But he still works hard. "Some people still believe the world is flat," he said. he is still at school.still Keeping quiet in the library is i___