1.The boss asked his secretary to go to a concert and she ______ his invitation with pleasure.

　　A.received B.accepted C.rejected D.refused

　　2.This tool machine is capable ______ being improved.

　　A.to B.in C.with D.of

　　3.We ______ very close，but things have changed recently.

　　A.used to be B.are used to being C.are used to be D.were used to being

　　4.He found it difficult to make himself ______.

　　A.understood B.be understood C.understand D.to understand

　　5.It rained hard yesterday，______ prevented me from going to the park.

　　A.that B.which C.as D.it

　　1.正确答案：B答案解析：译文：老板邀请他的秘书去听音乐会，她愉快地接受了邀请。此题考查词汇。receive表示客观“收到”;accept表示主观“接受”;reject意为“抛弃。拒绝”;refuse表示“拒绝”。从句中的with pleasure可知秘书“接受”了邀请。答案为B.

　　2.正确答案：D答案解析：be capable of：能够，有能力。

　　3.正确答案：A答案解析：表示“过去常常”用used to do(be)。译文：我们过去非常亲近。但近来事情已经发生变化。

　　4.正确答案：A答案解析：make sb done：使某人被……。

　　本题中的make himself understood意思是“使他自己被理解”。句中的it是形式宾语，make himself understood是真正的宾语。句意：他发现让别人理解自己很困难。

　　5.正确答案：B答案解析：逗号后面是which引导的非限定性定语从句，which指代前面的整个句子。