.The teacher demanded that our examination paper _____handed in at once . A be B must be C would be D had to be
They are said to have developed a new ______ to teaching, which is said to improve classroom teaching greatly.
The first one ______ will get a beautiful gift.
Children, who grow up in a friendly family, are more ______ to get along wellwith others.
______ where to go, he asked a passer-by for help.
It is global warming, not other things, ______ the extreme weather.