If a substance is dissolved in water or heated ， it may （）a gas.
A、giveintoC
「句意」如果一種物質溶解在水里或被加熱，它可能釋放出一種氣體。
「難點」giveinto為非固定搭配;giveover意為“托付，交托”;giveoff意為“散發”;giveaway意為“送掉，分發(獎品)等”。
Thethreementriedmanytimestosneakacrosstheborderintotheneighboringcountry_____bythepoliceeachtime.
_____himtomorrow.
ProfessorJohnsonissaid_____somesignificantadvanceinhisresearchinthepastyears.
Wecanhear____fromthebackoftheroom.
Thesmallmountainvillagewas（）bythesnowformorethanonemonth.
