南极地区蕴藏着全世界最丰富的资源，它是[ ]
A．固态淡水
B．石油
C．天然气
D．煤炭
答案：A
_____ , the pay isn’t attractive enough, though the job itself is quite interesting.
A．Generally speaking
B．On the contrary
C．In particular
D．To be honest
能够到银行办理贴现的商业票据只能是( )。
A．本票B．支票C．商业汇票D．信用证
