We discussed three different _______ to the study of mathematics．
A. methods B. accesses
C. means D. approaches
The Chinese scientists claimed _______ a cure for the disease．
A. having discovered B. discovering
C. to have discovered D. that they discover
He likes helping others, _______ those who are in trouble.
A. in theory B. in favour
C. in particular D. in practice
The bell _______ the end of the period rang, interrupting our heated discussion.
A. to indicate B. indicating
C. indicates D. indicated
The Harry Potter books are quite popular, they are in great_______ in the city.
A. quantity B. progress
C. demand D. production
--- May I have a word with you? I won't _______ much of your time.
--- Sure.
A. take out B. take off
C. take on D. take up
