You have set the value of the NLS_TIMESTAMP_TZ_FORMAT parameter in the parameter file to YYYY-MM-DD. The default format of which two data types would be affected by this setting？ （）
第1题：
You seldom have to do the cooking,______?
A. have you
B. haven't you
C. do you
D. don't you
15．答案为C 你很少做饭，不是吗?seldom“很少……”，带否定意味，因此反意疑问句用肯定形式。而且主句中have to为情态动词，不是实义动词。
第2题：
A、should have done
B、must have done
C、must do
D、have to do
第3题：
2． You_________ make the dishes if you don t like to．
A． have not to
B． has not to
C． don't have to
D． doesn’t have to
第4题：
Thank you for your gifts, but you ____ such expensive things.
A. mustn’t buy
B. shouldn’t buy
C. mustn’t have bought
D. shouldn’t have bought
第5题：
A、repair
B、repaired
C、repairing
D、to repair
第6题：
A unless you will have ;
B unless you don’t have ;
C unless you have
第7题：
Most banks have a section()you set up payees.
A、 that
B、 which
C、 in which
第8题：
You buy a gift, but you can if you want to.
A. must
B. mustn't
C. have to
D. don't have to
第9题：
A、do not practice
B、must have practiced
C、may have practiced
D、mustn’t have practiced
第10题：
Do you have a set of ______ (key)?