A.was concerned with | B.concerned about |
C.concerning | D.to concern |
A.to fill | B.filled | C.filling | D.fill |
A.indicating; interrupting | B.indicated; interrupting |
C.indicating; interrupted | D.indicated; interrupted |
A.to study | B.to be studying |
C.to have studied | D.studied |
A.were included | B.including |
C.include | D.included |
A.smoking; smoking | B.to smoke; to smoke |
C.smoking; to smoke | D.to smoke; smoking |
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