【山东省青岛市2015年中考英语试题】Robert Hunt sometimes advises the students common problems.
—Always look around________you cross the street,David.—OK.I know,Mum.A.untilB.beforeC.unless
The thieves ran away at once when the burglar alarm(防盗报警器)________.
—Did you see Mr Smith when you were in France?—No.When I________France,he________to China.
He told us that he________the letters in the morning.
By nine o’clock yesterday evening,we________our work.