He ______ (pretend) that a tiger toy was real and giving it a voice.
It might have made it a little ______ (hard) for everybody because it meant they had to turn around, but that didn’t stop the kids in the class.
I left it early because I had an appointment ______ (late) that day.
If everybody realizes the ___________(important) of environment and does something to stop pollution, the problem will be solved.
Air pollution is caused by the following _________: about half of the problem is caused by vehicles.
With the ____________ (develop) of industry, air pollution is getting more and more serious.
