—What are you looking for?—I'm looking for the pen ______ my father gave me last week.
— You look so sad. What happened?— The exam _____ to be much harder than I thought.
More and more couples would rather _________ a second baby __________ their first child can feel less lonely.
________we had at the party!
You can’t believe how terrible the fire is _______ you see it with your own eyes.
---________ it is from our own planet Earth to Mars!--- Yes, it takes months to travel to Mars by spacecraft.