35. -----How can I use this washing machine?

　 ----- Well, just refer to the ________.

　 A. explanations　 B. introductions　 C. directions　 D. expressions

34.　 He sat in the classroom ______ his eyes on the blackboard.

　 A. fixed　　　 B. fixing　　 C. were fixed　 D. were fixing

33.　 I’d ______ that house for the time being; house prices are rising sharply at the moment.

　 A. hold on　　 B. hold up　　 C. hold on to　　 D. hold back