Every time ______ I see the picture there, I think of my days in a remote mountain village

The rich only_________ themselves in making money and had no eye for the needs and welfare of their workers．

He found his book this morning, but now he _____ his pen

It was in this new hall _________ was justset up last month ________ we held an important meeting yesterday.

Gaining the knowledge ________ environmentalprotection will help you to become a qualified environmentalist.