_________ all the inventions have in common is _________ they have succeeded.
The two countries were between 1989 and 1992.
His uncle gave him books to read, but after a page or two he would put __book down and pick up__ new one.
The oil must be used up, the light went out.
.They have their reasons for keeping their marriage___ secret for ___ moment.
---Poor Tom! He will have to work all the next month. ---Luckily, the basketball games are held.