It was not until she got home ___ Jennifer realized she had lost her keys.
The idea suddenly______me is that we should go outing.
As you study a globe,you may notice that ______ of the large land and areas are connected,or ______so.
The houses in this village are______built of bricks.
The poisonous atmosphere will surely ______a lot of people.
Before the first nonstop flight made in 1949,it______necessary for all planes to land for refueling.