根据句意选择单词或短语，并用适当形式填空（每词只能使用一次，有两个多余选项）。

perform	bring…to life	base…on…	add…to…	persuade	affect
image	refer to	out of place	leave…alone	specialize in	be in demand

 
His bad habits of reading in bed _____ his eye-sight． As a result, he had to wear glasses．
Employees with skills ________ in joint-venture enterprises．
The performances given by these young people succeeded in _______ a dull play ______．
At last, my little son _____ to put his whole heart into his studies at school so as to keep up with others．
In teaching a foreign language, it is important for teachers _____ new teaching methods ___ our teaching process．
Teaching is an art ______ science．
Which students ____ the teacher ______when she spoke of the most promising ones?
On account of his illness, he ___ never ________．
It is ______ for anyone to laugh at those who are in trouble．
Many teenagers love to watch a conjurer _______ tricks．