Consider how long it used to take to send a letter across a relatively short distance.consider是祈使句?how long引导的什么从句 use to do的用法吧 就是使用的意思吧

Consider how long it used to take to send a letter across a relatively short distance.consider是祈使句?how long引导的什么从句 use to do的用法吧 就是使用的意思吧 How long is it? that可否省略?How long do you consider ________ take to finish repairing it?A it'll B that it'll为什么A对B错,我认为consider后面加从句应该有that啊. How long does it last? How long will it take? how long it takes 和how hurt it is how long dose it和how long does it的区别说错了 how long dose it和how long is it的区别 how long does it take you? How long is it?同义句 How long did it take you____your homework? How long does it take by t()? How long is it 中文怎么读 HOW long is it's taii how long did you ____ it how long will it wake to walk How long long does it take you to get there how long is 可以指时间吗 也可以指距离吗 可以问it is how long吗?能问how long it how long it 是how long will it take还是how long it will take