You want to use the Flashback Transaction Query feature to identify all the changes made to your database within a specific time period. What is a prerequisite for using the Flashback Transaction Query feature？（）
第1题：
—What do you want to do?\n—________________.
A.No, I don’t want to do anything.
B.I want to watch TV for a change.
C.What do you want to do then?
D.How about having a picnic?
第2题：
As the brochures you sent us were() damaged in the mail, we would like you to mail us some more.
A、bad
B、hardly
C、very
D、severely
第3题：
A. What do you want to do
B. What ‟s he want to do
C. What does he want to do
D. What are you want to do
第4题：
Ben, would you like to play football with us?（）but I have to wash the dishes first.
第5题：
A. When you want all unauthenticated traffic to be redirected
B. When you want all clear text traffic to be redirected.
C. When you want all authenticated traffic to be redirected.
D. When you want all encrypted traffic to be redirected.
第6题：
听力原文：M: Good afternoon, Madam. I want to exchange some US dollars for RMB Yuan. I've got USD 500.89.
W: All right. This is an exchange memo. Please fill in your name and the amount you intend to change.
Q: How much US dollars does the man want to exchange?
(19)
A．USD508.09.
B．USD58.9.
C．USD500.89.
D．USD50089.
第7题：
Why do you want to work for us?
第8题：
-Can you tell us why you think this makes good business sense to you? -We've been doing quite well on our own and we could probably survive like this for quite a few more years to come, but if we really want to take it to the next level, ____________.
：A the board of directors needn't take the present economic situation into consideration ;
B it's not necessary for us to develop the company any more ;
C we are going to have to consider finding more investors
第9题：
Ben, would you like to play football with us?（）but I have to wash the dishes first.
ANo, I can't
BI don't want to
CYes, please
DI'd love to
第10题：
You must explain（）how they succeeded（）the experiment.