下列句子中，没有语病句意明确的一句是（ ）

4 When Mary finally got there, Tom had left an hour _____

_________ no doubt that a green campus plays an important role in the growth of students, both physically and mentally

I suggest Zhoushan for your holiday. It is really _______ a visit.

lm Harry Potter Ⅳ is ______ for children above12 and adults, for it contains horror and violence