记账式国债的特点不包括（）。

A．具有一定的风险 

B．期限有长有短，适合中长期国债的发行 

C．可上市转让，流通性好 

D．可以记名、挂失

根据语篇内容，用恰当的短语填空，使之意思完整。

     Thanks for your invitation. I’m sorry I can’t visit you this week. I am (1)_________________. This

evening I’m going to my cousin’s house. It’s my cousin’s birthday. Today I have a toothache, so I have to

see the dentist tomorrow. On Friday, there will be a math test, and I (2)_________________. On Friday

evening, a new film will be on, and I'm (3)_________________ with my friends.