Guess what I happened to have met Mark at the party last week.—If my memory serves me correctly, you two ________ each other for almost ten years.

I’m looking forward ________ a trip to Mount Tai.[ ]

Tom has admired my daughter for a long time, but the question is ______ she doesn’t love him at all．

The Nile River ____ flood large areas but now the water ____ produce electricity. [ ]

Sam spends two hours _______ his homework every day.