(届安徽省马鞍山市高三第一次教学质量检测英语试卷)The new education system is said to be _______ to the successful development of the country.
.He must be the person who has been late a third time this week, __________?
.They were known as “ aborigines”, _____ “the first people of the country”.
They climbed rocks, _____rivers and settled in the valley.
He has _______good knowledge of _____English language but not much of English history.
The weatherman said that it is ____ to rain, but not _____.