Neither the students nor their teacher _______ the solution to the problem.
You____touchanelectricfire.It'sdangerous.
—_______.Whereisthebank? —It'sovertherebythepostoffice.
TheGreatWallofChinais_______wallintheworld.
Thinkofanumber,_______don'ttellmewhatitis.
—Iamjustgoingtothe_____.Doyouwantanything? —Yes,abagofrice.