1.A 2.B 3.A 4.D 5.A
1、The old lady carrying a basketful of eggs was run down by a taxi when crossing the street.
正确
2、That（It) is known to the world that Mark Twain is a great American writer.
错误
3、Though he had changed greatly,I still could recognize his sound.
正确
4、Thousands and thousands of volunteer workers took part in the construction of the buildings in 1958.
错误
5、I’d rather watch TV at home than go to the cinema.
错误