it is important to be clear.这里为什么要加be?为什么不说it is important to clear?

it is important to learn about the （b ) langit is important to learn about the （b ) language it is very important to people why is it important to speak English? It is important to be careful with is it important to look good?why? just like 和 It is important to why is it important to practice regularly? It is important to us (learn)English It is Very important __us__ it.a.to,to remember b.FOR,TO REMEMBER c.FOR,REMEMBERINGd.TO,REMEMBERING It is important ______us to learn English.A.to B.of C.for it is important to it is important for it is important of 这三个结构都有吗 都怎么用 it is nice to be important but it is more important to be It is important to like someone.It is very important to love yourself. It is important English every moming.A、 to readIt is important English every moming.A、 to read  B、 reading  C、 read  D、 to reading  it is important for you_____yourselfA.believe B.believingc.believes D.to believe选什么 理由呢 （ ）is important to have some good habits.A.It B.that C.This D.There （ ）is important for us to learn English wellA.It b.That C.This D.One ( )It is important ( ) people ( ) learn team spirit. A.of;of B.of;to C.for;to D.to;to