下列组合中,依次属于种群、群落、生态系统的一组是①一块稻田中所有三化螟幼虫、蛹和成虫 ②崇明岛东滩的全部生物 ③东方绿洲的 全部生物及无机环境 ④九段沙湿地的全部动物及绿色植物
Why are you leaving your job?
I can't stand it any longer.I always ____ to work overtime.( )
am; asking
am; asked
was; asking
was; asked
I don't care what people think.
Well,you ___.You're not alone in this world.( )
can
may
should
will
Father brought his little boy to a concert.But he was too young to sit ___ the whole concert.( )
for
with
during
through
Paul,I'm busy cooking.Can you give a hand?
Just a minute.I my e﹣mail.( )
A.am checkingB.will check
C.have checkedD.was checking
Jimmy,where are my glasses?I have looked everywhere.
Oh,Granny.They are _____ on your nose.( )
even
well
right
ever