_______the road, be careful.

　　A. While crossing         B. When cross              C. Crossed            D. Being crossed   

Whether it will do us harm remains_______ .

　　A.seen    B.seeing        C.being seen D.to be seen

He reads newspapers every day to keep himself _______ about what's going on in the world.　A. inform　 　     B. informing　           C. informed 　     D. being informed　

Many things _______ impossible in the past are very common today.

　A. consider　              B. considering 　          C. considered　　         D. be considered

.There was so much noise in the room that the speaker couldn't make himself

　A. being heard　　　B. hearing　　　               C. heard　　　        D. hear

---Will the Smiths go abroad this summer?             

---No, they finally decided  _______  .

              A. to              B. not going                  C. not to                D. not to be going

I used to __ to the south, so now, I am used to __ in a hot climate.

  A. go; live  B. going; living   C. go; living   D. going; live

________hard before, Tom is afraid of failing in the exam.

A. Having been worked        B. Not to have worked

C. Having never worked       D. Never have worked

I rushed there in a taxi only _______ the library_______.

　　A. finding; closed         B. finding; shut            C. to find; close     D. to find; closed

 Anything worth ______ is worthy of ______.

  A. doing, doing                                        B. doing, being done 

C. being done, to be done                          D. to be done, being done