I think it useful a_____,so I will take it.

I think it useful a_____,so I will take it. I think it's a.useful job.翻译 I think it's useful for the environment. 我认为和他为此争吵没有用 I don't think it's useful ( )(我认为和他为此争吵没有用 I don't think it's useful ( )( )( )( )about this Because I think it's useful.I want to learn English[ ].补全对话 i think It (is) useful to learn english well.括号里面的is要不要加? I don't think it's useful to have support teams,----（反意疑问句） I think it's _____ useful advice ,so I always remember it.A.a B.an C.the Science is_____ sometimes for me,but I think it's useful and I should learn itScience is_______ sometimes for me.but I think it's useful and I should learn it 填冠词.2.This is a useful dictionary,I think.So it is,and it's( ) unusual one. 英语.i find it useful.为什么不加is换成i think 的话用加is吗? I think it's----useful advice.So I always remember itA a B an C the D/ I don't know who invented the machine,but I think it is a/the useful invention.a还是the? to learn a foreign language well is useful,I think(改为同义句)I think it useful to learn a foreign language well .这里的第二句话中为什么用it而不是it's I found it difficult to fall a_ last night I'll do it a_ to your instructions. I don't think it is useful for me to finish the task ----?A can it B is it C can't it D isn't it 为什么 I think——（this,that,it）is very useful to learn english well.填那个,