Your new bike is so nice! When did you buy it?
In July. I _____it for two weeks.( )
A.hadB.have had
C.have boughtD.bought
The air pollution is a serious in our country. Our government is trying to solve it.( )
choice
program
problem
opinion
It's fine today. Let's go out for a walk.
( )
What a surprise!
That's a good idea!
Have a nice day!
I'm not sure about that!
Hawking's book A Brief History of Time came after years' hard work.( )
out
on
down
up
Today, with the Internet, people can communicate than ever before.( )
easily
more easily
most easily
the most easily
We on the playground when it began to rain.( )
ran
were running
run
have run