21. We don’t understand what the professor means, but we’ve got ____ rough idea of ____ project plan.
A. the; a B. the; / C. a; the D. a; /
22. ____ in the area reported _____ three people robbing the bank with their heads wrapped in stocks.
A. Witness; to look at B. Witnesses; seeing
C. Witnesses; looking out D. Witness; to see
