化简：2（a2+ab）-3（a2-2ab）
原式=2a2+2ab-3a2+6ab
=-a2+8ab．
从________世纪开始，欧洲殖民者来到我国沿海地区，进行侵略活动。
To better understand the English poem, we ___ it into Chinese.
A．put
B．make
C．change
D．turn
