--How’s your tour around the North Lake? Is it beautiful?---It be, but it is now
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--How’s your tour around the North Lake? Is it beautiful?
---It ________ be, but it is now heavily polluted.
A. will B. would C. should D. must
试题答案
C
解析：should意为“（本来）应该”。根据所提供的情景“but it is now heavily polluted”可判断出它本应该是美丽的。will作情态动词意为“愿意”；would意为“愿意”；must意为“必须”。