﹣Do you know______________？
﹣Sorry， I've never had an e﹣book before． Why not read the instructions first？（ ）
A．how can I turn the e﹣book on
B．how I can turn the e﹣book on
C．where can I buy an e﹣book
D．where I can buy an e﹣book
Rainbows ________ when sunlight passes through small drops of water in the sky.
| A． |
produce |
B． |
produced |
C． |
are produced |
D． |
were produced |
Alice often ________ the fun of doing DIY with us. She is so creative!
| A． |
shares |
B． |
provides |
C． |
makes |
D． |
gives |
The biggest challenge we all face is to prevent further environmental disasters. We ________ take action before it is too late.
| A． |
can |
B． |
must |
C． |
may |
D． |
might |
Yuan Longping and his team have solved the problem of ________ for many people.
| A． |
hunger |
B． |
health |
C． |
pollution |
D． |
population |
-Why are you laughing, Daniel?
- There is ________ funny in the newspaper. Come and see.
| A． |
anything |
B． |
something |
C． |
everything |
D． |
nothing |