A.sitting; so | B.sit; such | C.to be sitting; so | D.to sit; such |
A.waited | B.waiting | C.to wait | D.wait |
A.to look | B.looking | C.looked | D.and looking |
A.used | B.using | C.and use | D.uses |
A.closed; open | B.closed; opened | C.closing; open | D.closing; opening |
A.to disappoint | B.to be disappointed | C.disappointing | D.being disappointed |
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