新概念3第1課、第三課的疑問
Lesson1
Paw prints were seen in anumber of places and puma fur was found clinging to bushes.Several people complained of 'cat-like noises' at night and abusinessman on a fishing trip saw the puma up a tree.The experts were nowfully convinced that the animal was a puma,but where had it come from?(疑問：這里為什么不用where did it come from?必須用had嗎?有什么區(qū)別?) As no pumas had beenreported missing from any zoo in the country,this one must have been in thepossession of a private collector and somehow managed to escape.
Lesson3
Some time ago,andinteresting discovery was made by archaeologists on the Aegean island of Kea.An American team explored a templewhich stands in an ancient city on the promontory of Ayia Irini.The city atone time must have been prosperous,for it enjoyed a high level ofcivilization.Houses -- often three storeys high(這里often three storeys 是指房子一般有3層,還是指房子很高,一層樓像平常的三層樓一樣高?) -- were built of stone.