19. The ______ shoes were covered with mud, so I asked them to take them off before they got into ______ car.

A. girl’s; Tom’s

B. girls’; Toms’

C. girls’; Tom’s

D. girl’s; Toms’

20. The system has been designed to give students quick and easy ______ to the digital resources of the library.

A. access

B. passage

C. way

D. approach

21. —He says that my new car is a _____ of money.

—Don’t you think those words are just sour grapes?

A. lack

B. load

C. question

D. waste

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