1 . The old ______ likes to collect some old paintings and his house is said to build up a fine art ______. (collect) (所给词的适当形式填空)

3 . The company provides free service of rubbish ________ (收集）. (根据汉语意思单词拼写)

4 . The company is running out of its fund__________and may soon be unable to pay its bills.

A．reserves

B．sources

C．incomes

D．collections

5 . With their patience and efforts, Chris and Tim successfully developed a ____ of artificial breeding (人工繁殖）and natural reproduction.

A．collection

B．combination

C．system

D．strategy

6 . Since our school does not employ full-time librarians, the library ________ is usually run by volunteers with special responsibilities for library work.

A．principle

B．collection

C．application

D．personnel