A：（1）

C

C

B：Good morning，Tina.
A：（2）

B

B

B：By bike.It can save a lot of time.
A：Yeah.There are other advantages of bike riding.It's good for our health.
B：That's right.（3）

A

A

A：I agree with you.By the way，do you know bike-sharing？
B：Yes，it is still popular.We often see people riding this kind of bike on the road.
A：It means more people are playing a part in protecting the environment.Besides riding a bike，what else can we do？
B：Don't use plastic bags.
A：Why not？（4）

D

D

B：Of course，they are really useful for us.But they are bad for our environment.
A：（5）

C

C

B：We can use cloth bags instead of plastic ones.
A：That's a good idea.Oh，it's time for work.See you!
B：See you!

（1）A.Good afternoon，Bob.
B.Good evening，Bob.
C.Good morning，Bob.
D.How are you，Bob.
（2）A.How far is it from your home to work？
B.How do you go to work？
C.How long does it take？
D.How much does it cost？
（3）A.It's also good for the environment.
B.It's harmful to the environment.
C.It costs much money.
D.It's a good way to save time.
（4）A.I think they are soft.
B.I think they are colorful.
C.I think they are expensive.
D.I think they are useful.
（5）A.How can we get home after shopping？
B.How can we make plastic bags？
C.How can we carry things after shopping？
D.How can we pollute the environment？