— ________. I have to leave now.
A:doing homework; Yes, go ahead
B:playing cards; Yes, please
C:making some dumplings; No thanks
D:flying kites; I'm afraid not.
塔里木盆地最丰富的矿产资源是( )
青头大吃一惊,它一下子_______到牛身上,可是那头牛用尾巴轻轻一扫,青头就给_______到地上了。青头不顾身上的疼痛,一骨碌_______起来大声_______:“躲过它的牙齿,牛在这时候不会仔细嚼的,它会把你和草一起吞到肚子里去……”
用辗转相除法求得15与2015的最大公约数是 ____.