一节：单项填空（共15小题，每小题1分，满分15分）
21. — Have you seen ____ pencil? I left it here this morning.
—Is it _____black one? I think I saw it somewhere.
A. a; the B. the; the C. the; a D. a; a
22. Jordan kept his illness from his opponents before the final game ________ they might know about it.
A. now that B. on condition that C. for fear that D. in order that
23. You cannot imagine what great trouble I took ______ your house.
A. to find B. finding C. found D. having found
24. Mandela, having devoted all his life to the freedom of South African Blacks, is a real fighter for us to_________.
A. live up to B. come up to C. make up to D. look up to
25. The government has taken some measures to solve the shortage of electricity, but it may be some time
