I CAN HEAR A CAT ... ON THE ROOF.A. SCRATCHINGB. SCRATCHESC. TO SC...

46. - 1500 QUESTION CERTIFICATION EXAM TESTS ENGLISH LANGUAGE PPT

1500 QUESTION CERTIFICATION EXAM TESTS ENGLISH LANGUAGE PPT

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46. I can hear a cat ... on the roof.

a. scratching

b. scratches

c. to scratch

d. was scratching

 a