Seventy-five percent of the surface of the earth （） by water.
A: are covered
B: is covered
C: have been covered
D: was covered
A: are covered
B: is covered
C: have been covered
D: was covered
举一反三
- 2.______ of the earth surface is covered by water. A: thirty percent B: forty percent C: fifty percent D: seventy percent
- About seventy percent of the surface of our planet ( ) covered by water. A: are B: is C: were D: was
- Three-fourths of the surface of the earth ______ covered with water.
- Three-fourths of the surface of the earth ______ covered with water.
- If all the continents and mountains were bulldozed fiat, the earth __ by water more than 12,000 feet deep. A: is covered B: would be covered C: could have been covered D: might had been covered