Question

Our school building is made of bricks. (Change into Past Perfect Tense)​

Answer 1

Answer:

Hepatitis B surface antigen (HBsAg): A protein on the surface of hepatitis B virus; it can be detected in high levels in serum during acute or chronic hepatitis B virus infection. The presence of HBsAg indicates that the person is infectious.

Answer 2

Answer:

Here's your answer delivered fresh from the human brain:-

Our school building has been made of bricks.

HOPE IT HELPS!

LEARN SOMETHING NEW EVERY DAY !

The biggest room in the world is the room for improvement!

have a good day ahead