根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。
disappear   argue   not be   reply   explain
Mr. Wu is very patient. He always ____________ things to us for a long time.
--- ____________ your penfriend ____________ to your e-mail?
--- No, not yet.
Animals ____________ faster and faster at present and we should take actions to make
more people realize the importance of protecting animals.
Miss Wang hopes we ____________ late for school again.
---Where are the children?
---They____________ about what TV programmes to watch in the sitting room.