Fill in the correct form of sein for each noun. Pay attention to whether the noun is singular or plural.
Der
The boss is strict, and the assistant is friendly.
Das
The office is large, and the windows are bright.
Der
The desk is tidy, and the colleagues are helpful.
Die
The secretary is busy, and the meetings are long.
Das
The project is important, and the deadline is near.
Der
The employee is punctual, and the female colleagues are motivated.
Das
The phone is ringing, and the emails are urgent.
Die
The conference is productive, and the suggestions are innovative.