宴请策划的内容。
参考答案：（1）宴请的目的（2分） （2）宴请的范围（1分） （3）宴请名单（1分） （4）宴请形式（1分）
It is believed that a new kind of drug ______ by the scientists and they are hopeful that they will succeed in a few months.
A．has been developed
B．is being developed
C．is developing
D．has developed
____ has never occurred to us that the accident can do so great harm to the family．
A．That
B．It
C．This
D．One
