听力原文：M: There are some interesting shells on the beach today.W: What if we collect som

听力原文：There are exceptions to the rule of male insects being smaller than the females,

听力原文：（A) Some people are sitting next to the fountain.（B) Some people are waiting for

听力原文：（A) Some boats are docked in the harbor.（B) The boats are transporting cargo.（C)

听力原文：（A) The posters on the side of the building are being put up.（B) Some people are

听力原文：（A) Some boats are sitting in the water.（B) Some people are fishing.（C) The boats

听力原文：According to some research, there is still relatively little job mobility in Amer