Roses need special care ____ they can live through winter. 

because                      B. so that                    C. even if                    D. as

 Liza ____ well not want to go on the trip- she hates travelling.

A.will                         B. can                         C. must                             D. may 

I like getting up very early in summer. The morning air is so good ____.

A.to be breathed 　B. to breathe C. breathing D. being breathed

---What do you think we can do for our aged parents?

---You ____ do anything except to be with them and be yourself.

A.don't have to B. oughtn't to C. mustn't D. can't

---What does the sign over there read?

---"No person ____ smoke or carry a lighted cigarette, cigar or pipe in this area. "

A.will 　　　　　　　　　　　 B. may 　　　　　　　　　　 C. shall 　　　 　　　　　　　　　　 D. must

 The teacher ____ have thought Johnson was worth it or she wouldn't have wasted time on him suppose. 

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

 In crowded places like airports and railway stations, you ____ take care of your luggage.

A.can                         B. may                        C. must                             D. will

 ---How's your tour around the North Lake?---It ____ be, but it is now heavily polluted.

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

 ---My cat's really fat. ---You ____ have given her so much food.

A.wouldn't                  B. couldn't                  C. shouldn't                 D. mustn't

I told your friend how to get to the hotel, but perhaps I ____ have driven her there.

A.could B. must C. might D. should