24. Could I speak to ______ is in charge of International Sales please?(A). who(B). what(C). whoever
25. What do you mean, there are only ten tickets? There _____ be twelve.(A). should(B) .would(C). wi
26. His sister left home in 1998, and _______since.(A). has not been heard of(B). has not been heard
28. She brought with her three friends, none of ______I had ever met before.(A). them(B). who(C). wh
29. Edward, you play so well, But I ______ you played the piano.(A). didn’t know(B). hadn’t known(C)
31. The computer was used in teaching. As a result, not only____, but students became more intereste
32. Encourage your children to try new things, but try not to ___ them too hard.(A). draw(B). strike
33. One of the most important questions they had to consider was _____ of public health.(A). what(B)