----- How about the book you are reading now?
----- Excellent indeed. You can find many problems we have come across _____ in it.
A.covered | B.covering | C.are referred | D.referred |
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----- How about the book you are reading now?
----- Excellent indeed. You can find many problems we have come across _____ in it.
A.covered | B.covering | C.are referred | D.referred |