Have you ever visited the Opera House?—Yes．When I was in Sydney, I ______ it twice

大家都知道，如果路边的小屋上写有W.C.的字样，那大概就是一个可以方便的地方。请问W.C.的完整英语形式是什么

Professor Wu is a teacher respected by all of us, who always ________ new teaching methods toimprove our English.[ ]

Mr smith has little acquaintance_____modern poetry while he has a wide knowledge ___ painting.When it comes _____music,he has a talent_______it

In order _______ his English，he joined an English club.