There are over 58,000 rocky objects in_____ space,about 900 of which could fall down onto ______ earth.
My mother lives __________ because she hardly ever exercises.
_________ she is a little girl, _________ she knows a lot.
---- When you finish __your novel (小说), please__ me a call . ---- All right .
Boys and girls , I am sorry to say that I have___to tell you .
Lucy isn’t __at sports ____her sister.