Three weeks not enough for the holiday

21. Three weeks not enough for the holiday.
A. are B. were C. was D. be
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22. Linguistics _out the ways in which languages work. A. find B. founded C. finds D. finding
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23. The Philippines of more than 7000 islands. A. consist B. consisting C. consisted D. consists
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24. The police to interview Fred about a robbery. A. want B. wants C. wanting D. has wanted
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25. Can I borrow your scissors? Mine not sharp enough. A. is B. are C. isn’t D. aren’t