Political parties often differ in their views on various _____ concerning their own countries.
There are forty-five students _______ in our class.
—By the way,have you moved into the new house? —Not yet.The walls ________.
It is reported that the floods have left about ________ people homeless.
Great attention must be paid ________ education,especially in the countryside.
—Was it in April, 1970 that China ________ sending its first satellite into space? —Yes, that's right.