My uncle _____ to see me. He'll be here soon.
Never before______ such a wonderful park, ______ I'd like to pay a visit again.
The manager asked me to______ the report, because he didn't want to speak for a long time at the meeting.
With the word "PM2.5"______ heard and seen in our life, people become more and more concerned about air pollution.
— The deadline is drawing, but I failed to challenge the task a third time. — ______ my brother have a try?
Mr. Zhang once taught in a remote village in Anhui province as a volunteer, which was ______ only on foot.