Books are our friends._____do you read books?
I read books every day.( )
How often
How soon
How long
The biggest challenge we all face is to prevent further environmental disasters. We ________ take action before it is too late.
can
must
may
might
Yuan Longping and his team have solved the problem of ________ for many people.
hunger
health
pollution
population
-Why are you laughing, Daniel?
- There is ________ funny in the newspaper. Come and see.
anything
something
everything
nothing
During Dr Mar's last visit, he ________ on 150 patients on the ORBIS plane.
operates
is operating
will operate
operated
No one is ________. The key is to learn from mistakes and never stop.
careful
generous
famous
perfect