it must ＿ interesting to clim up the huangmountain. a.is b.are c.be

it must have rained,＿it? Ann wants to be a reporter because she thinks it's interesting 对because she thinks it's interestin The movie last night was very interestin.（同义句转换） It（）（）（） movie last night. It must very nice It Must Be?歌词 it must be we must help it We must learn it I must fine it. You must look( )it You must have missed it It Must Be Love 歌词 It must be some catch. you must keep it well? It must ------a wonderful vacation. It must be him 歌词 it must be _____(interest) it must be rainy( )( )(随后)