An electrical fault could have caused the fire.

Father called up Angela on her birthday.

The major points of the lesson were quickly learnt by the class,but they were also quickly forgotten by them.

The employer said to the workman, "I cannot pay you higher wages."

It is impossible to do this.

The novels of Tolstoy interest me.

Has a dog ever bitten you?

The invigilator was reading out the instructions.

By now the winners will have been felicitated.