They will pay a visit to Europe in a couple of years _____ they have enough money.
The managers discussed the plan that they would like to see _______the next year.
how to do the homework, I went to ask my teacher for help.
You’d better leave the windows _________ and the door ___________.
We should spend as much time as we _______ over our lessons.
It’s _______ much more than I ________ it.