The boy is old enough to __________the difference ________right and wrong.
--- Would you mind my having another glass of beer? ---__________.
– When did you ________ to do the work?- Two months ago, we are through 80% of it at the moment.
To keep the air clean this hospital forbids all the patients ________ in and around it.
Tom looked at Jenny, with tears ________ his eyes, and shouted out the words ________ in his heart for years.
The shoes made in Chengdu are usually of high quality, so they ________ long.