I haven’t decided when __________ a holiday yet.
| A．took | B．taking |
| C．to take | D．take |
There are several chemical factories waste water into the river.
A．pour B．pouring C．pours
Last year，the population of that city 7,120,000.
A．was B．were C．has
In our class, about of the students are girls.
A．three fifth B．third fifths C．three fifths
One-child policy has controlling China’s population.
A．did well in B．worked good in C．worked well in
Mrs White isn’t here. She London.
A．has been to B．has gone to C．has gone