In a few years` time,millions of trees those mountains

来源:百度知道 编辑:UC知道 时间:2024/06/19 19:29:15
In a few years` time,millions of trees _________(cover) those mountains
为什么不能是have covered

is covering
因为树始终还是覆盖这山
而have covered说明树以前是覆盖的
但现在不再覆盖山了

will cover

In a few years` time这就表明是对将来的预期
所以不能用完成时
所以要用will cover