Choose the right words to complete these sentences.
1) This is the writer (whose/which) books I enjoy most of all.
2) Where (is/are) the money?
3) Who are you waiting (for/of)?
4) This is the book (who/which) I bought yesterday.
5) Andrew is the boy (which/that) everybody knows.
6) (On/At) Christmas Eve people usually decorate Christmas
trees.
7) What do you usually do (on/at) Easter?
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