___ research ___ the universe scientists have put a lot of i

___ research ___ the universe scientists have put a lot of i 一道介词选择2 ___ research ___ the universe scientists have put a () I have a lot of words ___ at the meeting. ____ scientists have done a lot of research on A1H1N1 flu,th I have ___ a lot about the population in China. We have a lot of rules in our school.___ ___a lot of rules i Recently you have ___ your family ___ a lot bacause of the a 9.The fat man took a lot of exercises,___ had put on some we Last night I ___ to the cinema.There ___ a lot of people the I don't know why I have a lot of truble ___ English.You'd be 句型转换 1 I always have a lot of things to do.(同义句转换） ___ I ___ The origin of the universe ___ human understanding.