一、用所给词的适当形式填空。
1. My dad (walk) to his factory in the past. Now he (take) the metro.
2. In the past, there (be) few cars. Now almost every family (have) one.
3. My father often (shop) online these days, but he (buy) things in cash twenty years ago.
4. Liu Jiajia (write) a report on changes last week. She (want) to share it with us.
5. —What are you doing now?
—I am chacting with my friend. We often (chat) online.

1. walked; takes 2. were; has 3. shops; bought 4. wrote; wants 5. chat

()1. In the past, people letters. Now they emails.

A.write; send
B.wrote; send
C.wrote; sent

1. B

()2. My grandma a smartphone. She it to call us every day.

A.has; uses
B.had; uses
C.has; used

2. A

()3. — did you go to school in the past?
—I walked.

A.What
B.How
C.Where

3. B

()4. Wang Bing's father almost fell. The robot him stand up.

A.help
B.helped
C.helps

4. B

()5. Now high-speed trains fast. They us save a lot of time.

A.travel; help
B.travelled; helped
C.travels; helps

5. A