"Take this medicine(吃药) and it will make your son better soon," the nurse says to the sick boy’s mother.
—The Blacks have _________Hainan Island. —Oh,really? I have never_________there before.
- How long may I ________this book? - For about a week.
We have________ Shanghai since we saw you last month.
In fact,I have lived here ________ 2000.
His sister’s never been to the Summer Palace, ?