7. Great changes have taken place since then in the factory _______we are working.
A. where
B. that
C. which
D. there
9. They arrived at a farmhouse, in front of ______sat a small boy.
A. whom
B. who
C. which
D. that
20. Li Ming, ______to the concert enjoyed it very much..
A. I went with
B. with whom I went
C. with who I went
D. I went with him
54.Energy is ______ makes things work.
A what
B everything
C something
D anything
56. _____ makes the school famous is _____ more than 90% of the students have been admitted to universities..
A what; because
B That; because
C That; what
D What; that