It was after having her first child at a time ______ my mother was working as a lawyer _______she decided to run for governor of the state.

下列各句中，语气最委婉的一句是

Let’s pile up the fallen leaves in the corner and _____ the floor.

The teacher found ____ difficult to decide ____ he would take with him to attend the conference.

下列各句中，没有语病的一句是