下列各组字母中,全部是元音字母的是_____.A. a, e, r B. i, u, e C. o, n, u
—David has made great progress recently. —_____, and _____.
Now most families have only one child _____ our country’s one-child policy.
—Can you write the number eighty-five thousand, six hundred and twenty-six?—Yes, it is _____.
This is the most beautiful park I have _____ visited.
Xi’an is a city with many places of interest and ____ tourists come here every year.