1. Large quantities of water ____________cooling purposes.
A. are needed for
B. is needed to
C. are need to
D. is need for
正确答案：B
2. Word has come____________some guests from Canada will visit our school.
A. what
B. that
C. whether
D. when
正确答案：B
3. Women workers wear hats ____________their hair gets caught in the machinery.
A. if
B. in case
C. unless
D. because
正确答案：B
4. A student, ____________ name I don't know, came to see me.
A. that
B. who
C. whose
D. whom
正确答案：C
5. The colour ____ from yellow through green to black.
A. consists
B. constitutes
C. composes
D. ranges
正确答案：D