小题1:If you take some ___________ after supper, you will be thinner. (exercise )

小题2:I have a good ___________ habit, so I’m very healthy.   ( eat )

小题3:They have been to many ______________ countries.  ( west )

小题4:Would you like _______________ to my party? ( come )

小题5:My classmate goes to the movies______________ a week.  ( two )

小题6:Here _____________ some books for you.  ( be )

小题7:When did you finish ___________ your first movie, Tom? ( make )

小题8:I’m sorry ____________ that you didn’t pass the exam.  (hear)

小题9:Mary ________to have the piano lesson every week .  ( have )

小题10:Dumplings are ______________Chinese food.  ( tradition )

影响期权价格的因素主要有（）。

A.期权合同的有效期长短

B.证券行情变化趋势

C.不同证券价格的波动程度

D.期权合同订立时证券的价格高低