台湾的地下矿藏多种多样，西部主要分布有 [ ]
A、金、铜
B、天然硫磺
C、煤、石油
D、稀土
答案：C
––Has your brother ever been to the Sand Lake?
––Yes, he has _______ the Sand Lake many times.
A．been to
B．gone to
C．go to
D．went
选择抗癌药物的基本原则是什么?
