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 Don’t handle the vase as if it ____ made of steel.

A. is                            B. were                       C. has been                      D. had been

 Do you think this shirt is too tight ____ the shoulders?

A. at                           B. on                          C. to                           D. across

 We ______ the difficulty together, but why didn’t you tell me?

A. should face                                 B. might face

C. could have faced                        D. must have faced

 Birds singing is sometimes a warning to other birds _____ away.

       A. to stay                    B. staying                    C. stayed                    D. stay

 ______ at the door before you enter my room, please.

A. Knock                    B. Knocking                C. Knocked                D. To knock

 Our friendship _____ quickly over the weeks that followed.

A. had developed                            B. was developing

C. would develop                            D. developed

—Have you heard about that fire in the market?

— Yes, fortunately no one _____.

A. hurt 　　　　　　　　　　　 B. was hurt 　　　　　　　 C. has hurt 　　　　　　　 D. had been hurt

 Many people have donated that type of blood; however, the blood bank needs _____.

A. some                      B. less                        C. much                     D. more

 _______ with care, one tin will last for six weeks.

A. Use                        B. Using                     C. Used                      D. To use

 When deeply absorbed in work, ______ he often was，he would forget all about eating or sleeping.

    A. that                  B. which                 C. where                 D. when