---If each of us__________ the environment, the world will become more beautiful.---I agree with you.A. takes measure to protectB. make a contribution to protectingC. makes a contribution to protect
To be healthy, one must have at least _____ sleep every day.
There are forty students in Class Four. And of them girls.
The Greens left Londona sunny morning.
Your Ipad is quite nice. Where did you buy______? I want to buy______, too.
The students didn’t find much about the topic on that website.