-When did you come back to Enshi?
-____the aftemoon of May lst.
A．On B．At C．In
After a three hours’ long walk, the boys look rather______.
| A．excited | B．bored | C．tired | D．stressed |
_____ great scientist Qian Xuesen is!
| A．How | B．How a | C．What | D．What a |
The moonlight goes _____ the window and makes the room bright.
| A．across | B．through | C．over | D．in |
Teenagers should learn to protect ______ from all kinds of danger.
| A．them | B．they | C．their | D．themselves |
With the help of the Internet, information can ______ every comer of the world quickly.
| A．go | B．land | C．reach | D．arrive |