10.A．strength          B. loudness        C. speed        D. rhythm
A． 线索：搭配结构含义。
She says that within a few minutes of being given __11__ the phones, students were using the vibration features to add emphasis to what they were saying or to interrupt the other speaker.   

11.A．students   B. them       C. /   D. her 
C. 线索：句子结构特点和搭配词语使用特点。
Over time, people even began to transmit their __12__ kind of ad hoc Morse code（摩尔斯代码）, which they could repeat back to show they were following what the other people was saying.

12.A．own          B. unique      C. other       D. different
A． 线索：句意。
It was pretty easy to communicate, though we didnt specifically（明确的） pre-arrange __13__, says…

13.A．codes            B. systems     C. wave bands      D. call time
A．线索：上下文用词。

14. Chang thinks Vibralanguages could __14__ for the same reason as texting (发短信): 

14.A．make out            B. go without      C. give in    D. take off

D．线索：句意。

Take off: v.广泛使用，大受欢迎, 起飞, 脱掉（衣服等）
e.g. a new movie that really took off.一部极为卖座的新片
e.g. The plane took off on time.飞机准时起飞
e.g. take ones coat off;
make out:  v. 辨明辨明或看清, 理解
e.g. I could barely make out the traffic signs through the rain.
在雨中我几乎看不清交通标志
e.g. I could not make out what she was saying.
我不能理解她在说些什么
go without v.没有...也行
go without saying v.理所当然, 不用说, 不言而喻
give in v.投降, 屈服, 让步
sometimes people want to communicate something __15__ everyone nearby knowing what theyre saying.

15.A．with      B. without        C. for      D. against
B. 备选项特点（A和B有关系；C和D有关系）和句意。