1.  It is quite______ honor to be_______ chairman of the conference
     A.  不填; the        B. a; 不填       C.  an ;不填       D. the ; the                            
2. The English competition we talked about ________in our school last week. 
A. being held    B. would be held       C. was held            D. holding 
3. It would be a good idea to use a plastic bottle, ___cut off, as a container to grow young plants in.  
A. of which the top       B. the top is    C. the top of which         D. with its top
4.  I feel it is your wife as well as you that______ for your son’s performance at school.
     A. are going to blame    B. are to be blamed     C. are to blame     D. is to blame