Some cranes are mounted in pairs on a common platform. which can be rotated through_____.A

_____ are mounted in pairs to protect the boiler against overpressure.A.Safety valvesB.Wat

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

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

Children are in need of adoption because some birth parents are unable or unavailable to p

Authors and poems are correctly paired in all of the following EXCEPTA．William Wordsworth—

Authors and poems are correctly paired in all of the following EXCEPTA.William Wordsworth—