_____ the decision(决定) is so hard.[ ]
A. Makes
B. make
C. made
D. making
答案：D
测量物体的长度，通常用（ ）、（ ）、（ ）来作单位。
The money collected should be made good use _____ the people in Taiwan who suffered a lot in the earthquake. [ ]
A. of helping
B. to help
C. to helping
D. of to help
