It is _____ to carry water to the mountain.
问题描述:
It is _____ to carry water to the mountain.
答
hard/difficult
unnecessary
答
difficulty(困难)或trouble(麻烦)
答
这个空可填的太多了. 不过只能填形容词如:hard ,happy difficult.,或表人的名词Tom.这里it是形式主语,to carry .是真正的主语,所填的是表语