1 . While he finally made it to the party, he was terribly embarrassed to find his casual clothes were not__________ for such a formal occasion.

A．available

B．considerable

C．appropriate

D．approximate

2 . The a___________________ date of his departure is next month. (大约)

3 . It is reported that the a______ (大约)cost for one- child education in a Chinese family is between 200000yuan and 300000yuan.