I tried phoning her office, but I couldn't __________.
Water, which seems so simple and common, is ______ makes life possible.
—Jimmy had a lot of parties recently. —Yes, that might ______ why he didn't do well in the test.
—The weather isn't good enough for an outing, is it? —Not in the least. We can't have ______ at this time of the year.
What an unforgettable experience! I’ll write it down ______ it is still fresh in my memory.
All the citizens, young and old, walked and sang, beautifully ______ in new clothes of all kinds, ______ the success of their football team.