Question

there are 2 buildings. the large of___stands nearly a hundred feet high.应填them?which?为什么？

Answer 1

them.因为前面一句句末结尾是句号。所以后面一句是完整的句子，不能用which来指代前面的2building.

Answer 2

which ，如果第二句开头有and，就用 them #^_^#

Answer 3

them，
There are 2 buildings. The large of_ them__stands nearly a hundred feet high.