Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
You must have waited here for a long time ,___________you?
Nearly________ of the surface of our planet is covered by water.
It's said that __________ is going to give us a lecture.
----Would you please lend me the dictionary? ---- ____.
Who is it up ____ decide whether to go or not?