I think___necessary for us to learn English well.A itB thatC itsD that's

I think___necessary for us to learn English well.A itB thatC itsD that's 1.I think___necessary for everybody to take aaction to protect the environment.a. that b. what c. it d. its2. mike was offered a job as a manager in a big copany in this city. that's___he came here. a. how b.what c.why d. because （ ）Don't you think___necessary for friends t（ ）Don't you think___necessary for friends to trust each other?A.one B.that C.with D.itps:说明一下理由,要完善. The maths problem was too difficult for students of our grade ___A.to answer B.to answer it C.to work out D.to work it out Many people think___necessary to have a good knowledge of an second when looking for a good job.A.that B.it C.which D.if i i I I, I I I i i i i -I I i