(单选题)12: ____________for my illness, I would have lent him a helping hand. A: Not being B: Without being C: Not having been D: Had it not been ...

(单选题)25: The water gives up energy and becomes cooler____________the ice receives energy and melts. A: when B: while C: for D: because ...

(单选题)21: The music was so loud. That's ____________he left the party so early. A: howr B: why C: what D: when ...

(单选题)16: The music was so loud. That's ____________he left the party so early. A: howr B: why C: what D: when ...

(单选题)4: Never hesitate to ask about A: that you don't understand B: what you don't understand C: which you don't understand D: what don't you understand ...

(单选题)6: He was willing to speak to the reporters____________ he was not identified. A: on condition that B: in case C: suppose that D: for fear that ...

(单选题)14: I don't know whether you happen____________, but I am going to study in the U.S.A this September. A: to be heard B: to be hearing C: to hear D: to have heard ...

(单选题)15: It ____________ whether he will go on with his study at the university. A: hasn't been decided B: isn't decided C: hasn't decided D: doesn't decide ...

(多选题)17: 影响声音质量的因素包括（ ）。 A: 声道数目 B: 采样频率 C: 量化位数 D: 存储介质 ...

(单选题)11: MIDI的音乐合成器有:1）音轨 2）复音 3）FM 4）波表 A: （1）、（2） B: （3）、（4） C: （1）、（2）、（3） D: 全部 ...