These plastic flowers look so _____ that many people think they are real.
-How about his design? -Well, to tell the truth, it is______but satisfactory.
-What's up? You look worried. Well,I_____on the problem for 5 hours but I haven't got a single clue.
A book I read last year,_______name l can't remember, changed my idea about time.
l'm afraid that I can't attend Tom's wedding party_______next weekend.
-May I have_____break, mum? Did you have_____ short one an hour ago?