—What is the population of China?
—China has ____population of l．3 billion．
A．the；the B．a；a C．a；the D the；a
The world is more forgiving than commonly ______, so we should be optimistic about life.
| A．declared | B．promoted | C．supposed | D．required |
I still remember the accident and the troubles ______ has caused to me.
| A．which | B．what | C．it | D．that |
Fujian has shut down the chicken markets ______ human infections of H7N9 were found.
| A．whose | B．why | C．which | D．where |
I got to the lecture hall very early, ______ to get a good rest.
| A．hoping | B．hoped | C．to hope | D．hope |
It hasn’t been announced ______ the plane is to take off.
| A．where | B．when | C．how | D．why |