Ifasubstanceisdissolvedinwaterorheated，itmay（）agas.
C
「句意」 如果一种物质溶解在水里或被加热，它可能释放出一种气体。
「难点」 give into 为非固定搭配; give over 意为“托付， 交托”;give off 意为 “散发”;give away 意为“送掉，分发(奖品)等”。
ProfessorJohnsonissaid_____somesignificantadvanceinhisresearchinthepastyears.
Although SPanish， he attended the course.
U.S. News ____________ rankings of colleges since 1983. They are a very popular resource for students looking to apply to university campus.
Evenifhisletter（）tomorrow，it（）toolatetodoanything.
At______,photographyisachemicalprocess,duringwhichalight-sensitivematerialisalteredwhenexposedtolight.