Question

8. (2013江苏泰州海陵区下学期期末，1, ★★ ★)—It says

that 70% of the earth  covered with water.

—Yes,but we still have to save water in our daily life.

   A. are   B. is

     C.were   D. was

Answer 1

8. B

8. B本句70% of the earth为主语,earth是不可数名词，故谓语 动词用单数；而“地球的70%都被水覆盖”是二不客事 实,应该用一般现在时。