—Was it not until last week（）he decided to give up smoking
—No. He began（）he saw the news film last month.

单项选择题______ that Mr. Thomson got such rare fishes

单项选择题It's impossible for a child to do so much work within a short period of time, ______

单项选择题After a long discussion, they ______ an agreement.

单项选择题学生活动与交往的基本场所是( )。

单项选择题With the shining water before you and the wind, ______ trees behind you, you can not help ______.