— Studies show that the earth is becoming warmer and warmer in recent years.
— Everyone should take action to save our planet ________it will not be in danger in the future.
A.so that B.even if C.ever since
A good book is always worth reading. We are supposed to choose a book ________before getting started.
A.freely B.secretly C.carefully
When Hubei Province was in great need of ________, Shanxi Province sent hundreds of them there. They really played an important role in the medical work.
A.teachers B.nurses C.drivers
— Chinese company Xiaomi is working on creating smart houses.
— That's cool. The light in the house can ________ people and turn itself on.
A.guide B.warn C.sense
To spend a________summer vacation, students are advised to do volunteer work to learn more about the society.
A.quiet B.meaningful C.comfortable
— It's reported that Taiyuan Subway Line 2 is going to be put into use by the end of this year. — That's good news. It will save ________much time when I travel in Taiyuan.
A.me B.you C.him
