______of them has been to Australia several times, so they know the Opera House very well.
It’s difficult for most people across the Pacific Ocean. A. swimming B. swim C. to swim
-- Mary, do you know if Mike to my party next week? -- I think he will come if he ______ free. A. will come; will be B. will come; is C. comes; is
I remember ______ an old people’s home. A. visit B. visiting C. to visit
In the violin contest, my sister didn’t play well and I did ______. Our parents were angry with us. A. very good B. much better C. even worse
-- How long ______ you TV by the time I called? -- For two hours. A. had; watched B. have; watched C. were; watching