Adverbs of frequency

Order the following sentences, which contain adverbs of frequency.

1. Which sentence is correct?

A. Our teacher is often late.

B. Our teacher often is late.

C. Is often our teacher late?

D. Often our teacher is late.

2. Which sentence is correct?

A. Never we eat fast food.

B. We eat never fast food.

C. We eat fast food never.

D. We never eat fast food.