问题
选择题
Although the huge engine, as tall as 25 meters, is heavy_______, it is powerful and works well.
A．carried
B．to be carried
C．to carry
D．being exposed
答案
答案：C
sth+be+adj.+to do结构中，习惯于用不定式的主动形式表被动含义，所以选C。句意：尽管这个巨大的机器，高达25米，很难搬动，但是它很有力量，运转的很好。