【B7】A．off and onB．back and forthC．up and downD．far and wide

She feel very tired and was glad to him.A、put onB、depend onC、lean on

● The （74） scheme in a database system is responsible for the detection of failures and fo

What will the man do next？A．Have a lunch and come back.B．Go on waiting.C．Give up and leave

The ship took machines and other goods back to the port ________ it had set off. A：from

He is______an important customer now and he will be back tonight.A．calling onB．calling upC

Weve signed an agreement and we cant______of it now.A．back downB．back offC．back upD．back o