(2014届山东省潍坊市高三3月模拟考试英语试卷) Tom had been studying French hard for nearly three years he mastered it.
The boy burst into tears ________ he saw his mother.
________, I could not memorize the text.
Raising environmental awareness was the aim of our art exhibition ____ last week.
_________ he was, he still went on with his work.
It was the training ________ he had as a young man ________ made him so excellent.