41. The factory ______ I am going to is the place ______ my mother used to work many years ago.
A. where, where B. where, which C. which, where D. that, which
42. Dont trust such men ______ over praise you to your face.
A. as B. that C. who D. which
43. The professor has two sons, ______ are teaching in the same university
A. neither of them B. either of them C. both of them D. both of whom
44. Dont do such things ______ you are not sure about.
A. that B. which C. as D. what
45. Rober is good at language, ______ we all know.
A. because B. for C. as D. since
46. China has hundreds of islands, ______ we all know.
A. in which B. at which C. of which D. which
47. She wrote a letter to her father, ______ she made her secret known.
A. which B. that C. in which D. where
48. Oxygen is a kind of gas, ______ we couldnt live.
A. without it B. without that C. without which D. if not
49. Matter is anything ______
A. that take up space and have weight B. which take up space and have weight
C. that takes up space and has weight D. those take up space and have weight
50. I have many books, the best ______ was borrowed by Mary.
A. about them B. of which C. among them D. in which
答案：41-45 CADCC 46-50 CCCCB