11.The visit of the President will increase the ______ between the two countries.
A.peace
B.knowledge
C.understanding
D.assistance
12.Mr.Smith promised me a good position and ______.
A.to pay me a fair salary
B.a fair salary
C.paying me a fair salary
D.pay me a fair salary
13.Peter said that he wouldn’t mind ______ the windows.
A.my opening
B.I open
C.me to open
D.for me to open
14.In the newspaper,we can learn ______ is going on in the world.
A.that
B.which
C.who
D.what
15.It is curious how children always behave much worse when they are ______ holiday.
A.on
B.in
C.at
D.for
11.答案：C。
increase the understanding between the two countries:增进两国之间的理解。
不能说increase the peace。knowledge为“知识”。assistance作“援助，帮助”。
12.答案：B。
and连接的是两个平行的宾语，它们的结构应该是相同的。这里是两个名词短语。
13.答案：A。
动词mind后跟动名词短语，动名词前可加一代词所有格表示行为主体。其余各项均不能成立。
14.答案：D。
learn后为宾语从句，疑问词what作主语。不能选B，which系指某一指定范围内的“哪一个”。
15.答案：A。
表示“在度假”，holiday前的介词应是on。
