Some students are playing basketball outside ,baskerball 和outside间要不要加介词?不用的原因是什么？

Look Some students are singing and o____ students are dancing Some students are very active and exercise Some students are( ) the school lidrary The students are busy__(do)some exercises Some students are taking p__near the 一道英语数学题There are 50 students in Wuhan Foreign Languages School who play on the baseball,football,and tennis teams.Some students play more than one sport.If 15 play tennis,25 play baseball,30 play football,8 play tennis and baseball,5 pl 英语连词成句和填空填空1 South points ________ on a map.2 ________ points left on a map.连词成句1 are,some,cakes,the,on,table,there2 singing,children,dancing,the,are,here,and3 are,seimming,in,they,the,now,river4 do,the,where,students,pl Some students are in the room.(对划线部分提问）划线部分是Some students there are some students in the hall(划线提问 一般疑问句 否定回答)some students 划线 Some of the students are American,ang one of the students are from England.【改错】 some of the students are playing baketball,______ students are playing footbother or the other why? The teacher with some students are 还是is plating trees. There are some students in the classroom,______反义疑问句 改为否定句 There are some students in the classroom. There are some students in the ciassroom ,（ ）（ (反义疑问句) are there some students in the classroom找错误改正 There are some students in the classroom (改为否定句) There are some students in the classroom.否定句