the red switch on the left and the flying machine will swiftly go up into the air and its journey.
—Jack, did you see my son Harry just now? —No,Mrs. White. I _______computer games.
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.