The environment here becomes better and better． birds are coming back．（ ）
| A． |
Hundred |
B． |
Hundreds |
| C． |
Thousand |
D． |
Thousands of |
一Any news about China's space station？Do you know ？
一At the end of 2022，I think.
A．when it will be in service
B．where it will be sent up
C．when will it be in service
D．where will it be sent up
一You added sugar in my tea？It terrible!
一Sorry，madam.I'll pour you another cup right away.
A．feelsB．looksC．soundsD．tastes
we've made the promise，let's keep to it and not give up easily.
A．WhetherB．SinceC．ThoughD．Unless
Listen up，guys!Everyone wear a mask.Go and buy one if you don't have one.
A．can'tB．canC．mustn'tD．must
My car broke down on the way to the airport，so I rushed there by taxi only to find my flight had been cancelled.What can I say？
A．It never rains but it pours.
B．Every dog has its day.
C．The early bird catches the worm.
D．Never put all your eggs in one basket.