根据句意，用括号中所给词的适当形式填空，并将答案写在答题卡的相应位置上。（共5小题；每小题1分，满分5分）
Mother is my first teacher. She teaches       a lot about life. ( I )
The little girl is running after a butterfly       in the garden. ( happy )
No pains, no gains. Without       hard, no one can achieve success in life. ( work )
Soccer is played by so many people all over the world, but only a few       are truly great. ( play )
The overseas Chinese in Yeman got       when they saw Chinese soldiers coming to their help. ( excite )