The director made two films last year,one of __________ was set in Chongqing.
You can find me easily, for there is only one house _______ roof is flat.
I shall never forget the days ______ I stayed in Africa, ________ has brought me a lot of advantages.
Never before in my life ________such a beautiful girl with so many high qualities.
—— Don’t smoke today, honey, it’s three months since you smoked.—— OK, I ______.
________ the mountains was hard work for them but as they looked around, they could not help screaming.