救急 3Q by the time when the course comes to and end,____a lot about computer.
问题描述：
救急 3Q by the time when the course comes to and end,____a lot about computer.
By the time when the course comes to and end,____a lot about computer.
A.we'll have learned B.that C.we're learning D.we've learned
答
By the time when the course comes to and end,_A.we'll have learned _a lot about computer.have done sth by (time)是习惯用法,by的时间是用完成时的.而前面comes to an end说明这个时间还没有到来,所以应该是将...