1.______with the new method,the material does not break up easily.
A.To have treated B.Having treated C.Being treated D.Having been treated
選D,意思是,"被新方法處理了之后,這種材料不會很容易就壞了".對于材料來說,是"被處理",被動的只有C和D,而根據(jù)題目意思,是處理好以后,所以用現(xiàn)在完成時的被動D.
2.When they met,Leonardo and his enemy were fighting_______.
A.killed each other B.killing each other C.to be killed each other D.to kill each other
句意是"當(dāng)他們相見的時候,里昂納多和他的對手都爭斗以致于互相殘殺",表示打斗的目的是互相殘殺,用不定式表示目的,所以選D.