24．A．since                   B．when                   C．while                     D．until

23．A．enjoyed               B．changed               C．finished                 D．started

22．A．owner                 B．maker                  C．seller                     D．repairer

21．A．believed              B．found                  C．decided                  D．thought

19．--Have you decided          the children in the poor area?

--By sending them books and schoolbags．

A．how you will help                                   B．what you will give

C．when will you call                                     D．how much will you send

18．--Perhaps I'm going to the market．

--Would you get me some juice          you’re there?

A．since                   B．as                        C．if                          D．after

17．Now the students each          an English-Chinese dictionary．

A．has                      B．have                    C．is having                D．are having

16．John，our foreign teacher，left Nantong two years ago，and I          him since then．

A．don't see              B．won't see                 C．didn't see                D．haven't seen

15．Mrs. Green          go to hospital，but now she is in good health．

A．has to                  B．needs to                  C．used to                   D．ought to