单项选择题
A．The doctor’s examination. B．His trouble with the cold. C．The tight neck of his sweater. D．His mother’s anxiety.
A．At the beginning of the 18th century. B．At the beginning of the 19th century. C．At the beginning of the 20th century. D．At the beginning of the 21th century.
A．It’s cheaper. B．It’s convenient. C．It has more goods than the retail shops. D．It’s dangerous to go out for shopping.