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Many people are taking part in various outdoor activities ______themselves.

The time and effort he has devoted during the past few years____ trees in that remote area is now considered to be of great value．

She suggested the problem worth paying attention ________ at the meeting.

Every minute must be made full use of________spoken English.

------“Where was Li Ming last night ?”
------“I saw him ____ his homework in the classroom.”

______ to train his daughter in English, he put an ad like this in the paper, “______, an English teacher for a ten-year-old girl.”

Genius is a complicated concept ,          many different factors.

I am calling to consult the position         in yesterday’s Tianjin Daily .

Who did the teacher have ___ an article for the wall newspaper just now?

The ______ look on his face suggests that his ______ report failed the test.