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21. Mr. Johnson insisted that he _____ his debts, but nobody believed him.
A. pay B. pays C. paid D. had paid
22. ____ many times, I could not remember her telephone number.
A. Told B. Being told C. Having told D. Having been told
23. He was so careless that he left _____the door ____.
A. leaving…unlocked B. to leave…locked
C. left…unlocking D. leaving…locking
24. She is _____ careful girl ______ she hardly makes mistakes in the exam.
A. so, that B. such, that C. a such, that D. such a, that
25. The new library, ______ last week, is very popular _____ the students.
A. opening, to B. opened, with C. open, to D. having been opened,
among
