I.单句填空 用所给动词的适当形式填空。
1．____________ (make) a long story short，he is going to kill the old man tonight.
答案：To make
2．I searched all the drawers ____________ (find) my lost necklace.
答案：to find
3．When ____________ (heat)，ice will be changed into water.
答案：heated
4．My mother could do nothing but ____________ (wait) for the doctor to arrive.
答案：wait
5．His ____________ (not pass) the exam made his mother sad.
答案：not passing
6．How ____________ (begin) is more difficult than where ____________ (stop)．
答案：to begin；to stop
7．My work is ____________ (clean) the manager’s office every day.
