it remains to sb to do
it remains to sb to do
在 How they will manage to do it remains to be seen.中:
It take sb.time to do sth
it takes sb sometime to do sth
make it easy to do sb造句
It'+形容词 for sb to do sth
it's nice of sb to do
It is typical of sb.to do
It takes sb+时间+to do
It costs sb money to do sth
it is 形容词 for sb.to do
it is +形容词+for sb to do.