It is our duty ______much attention to ________ our best to keep our city clean.
He couldn’t run __________ to catch up with the cat.
I wish __________ finish your homework first.
Seagull can’t fly far if they have no __________.
–Why do you like the parrot__________? --Because it has ________ feathers.
If prices rise too high, the government has to do something _________ it.