1.         ---How's your tour around the North Lake£¿ Is it beautiful£¿
---It be, but it is now heavily polluted.£¨¡¡¡¡£©

A. will                             B. would                          C. should                         D. must

2.         The boss has given everyone a special holiday, so we ______ go to work tomorrow.

A. can't                            B. mustn't                    C. needn't                    D. shouldn't

3.         -Guess what!I have got A for my term paper.
-Great!You ______ read widely and put a lot of work into it.£¨¡¡¡¡£©

A. must                           B. should                         C. must have            D. should have

4.         The biggest problem for most plants£¬which________just get up and run away when threatened£¬is that animals like to eat them£®£¨¡¡¡¡£©

A. shan't                          B. can't                            C. needn't                        D. mustn't

5.         ?As a result of the serious earthquake, two-thirds of the buildings in that area         .

A. need repairing               B. needs to repair             

C. needs repairing             D. need to repair