4. (1) … despite covering the planet, the earth … largely based on … (2) … although it covers the planet, the earth has a thrust … largely on the basis of … (3) … although covering the planet, the earth … largely on the basis of … despite是介词,后面是不是只能跟名字性啊 这里是不是应该用although 虽然狗主人选的是A。。