it is _(think) the population of the world has passed 6.5 billion so far请问应该是哪个时态?为什么呢?

i think it is on the sofa (改为否定句） i _ _ it _ on the desk. it is _(think) the population of the world has passed 6.5 billion so far i think that it is very nice at the rial taste pcture which you draw._ I think we should study for the math _ tonight,because it is really important.填test呢？ That's the________.Go and see who it is.That's the _ _ _ _ _ e _ _. It is few people ,{ } have come to ask for the position,{ }fit for the jobit is few people , _ have come to ask for the position , _ fit for the job.A who , I think are B that , I think is C what , who I think is D who , that I think are请问 汤很好喝.为什么不尝一尝它呢?是的,但我认为再加点盐会更鲜美.The soup _ very _.Why _ _ _ _ _ it?Yes,but I think it will _ _ _ a little _ salt. I don`t think it is _ _ _that book.我认为没有必要买那本书. What did you think of the play?i _ _ minute of it how unusual the book is 同义句 _ _ unusual _ it is! it is _(think) the population of the world has passed 6.5 billion so far请问应该是哪个时态?为什么呢? More and more people around the world are learning Chinese now.=more and more people _ _ theworld are learning Chinese now.They must go to bed before 10:00 p.m.=_ is _ _ _ _ _ go to bed before 10:00 p.m.It's not a good idea to keep a big dog in a sma It is _ the wall.It is near _ window._new The number 13 is a special number,_,some people think,will bring bad luck.The number 13 is a special number,____,some people think,will bring bad luck.A.what B.it C.which D.one选那个? the hat is expensive because it is made _ hand The drawer is _ _ _ _ _ .there arent any knives,forks or spoons in it 急 几道代词填空求助1.We think to(_)2.Mary is old enough to take care of(_)3.I am sure I can do it all by(_)4.Look,is this room beaytiful?I painted it ()5.I'd like to go for a walk.(_) too6.Did you enjoy (_)at the party yesterday?7.You and she di i do not think it is my _ that the window has been broken.a.error b.mistake c.fault d.duty为什么a b 选项不行呢,