A
With the development of science and technology，more and more changes have appeared in our society and lives, such as a smart home. It is controlled by a group of connected devices(设备). These devices work together to control things like security(安全), temperature and entertainment(娱乐).
The smart security system makes it easier to see each other and communicate through home cameras from anywhere. Have you ever locked your keys inside your home? Not a problem! The smart security system can lock or unlock the front door without a key.
When it's cold outside，most people want their homes to be warm. A smart temperature controller will remember what time people arrive home every day and make sure it's nice and warm when they walk in.
Smart speakers also make homes smarter. They listen for a special word or phrase and then follow the order that is given to them. A smart speaker might respond to "Please play my favourite music" or "Remind me to finish my homework later".
Living in a smart home sounds cool, doesn't it? As time goes on, we're sure to find more ways to make our homes smarter!
()1. What is making our world become smarter and smarter?
A. The smart home.
B. Communication.
C. The smart speaker.
D. Science and technology.
()2. What can the smart security system do?
A. It can keep your home warm enough.
B. It can follow orders given to it.
C. It can lock or unlock the front door without a key.
D. It can remember what time people arrive at home every day.
()3. What is the correct structure of the text?

()4. What can we know from the text?
A. Our homes will become smarter in the future.
B. A smart speaker cannot respond to our orders.
C. We cannot see each other or communicate through home cameras.
D. A smart temperature controller can listen for a special word or phrase.

1—4 DCBA