The reason Beethoven went away to the country is ______.

Having much to do，________．

What are on show in the museum? -Some photos _____by the children of Yushu, Qinghai.

I called you yesterday afternoon, but there was no reply.—I ______ a dolphin show the zoo with my cousins.

May I use your mobile phone, Meimei? –Sorry, I _________ it at home.