Mixed Rules 03

Fill in the missing tenses.
01. (you / smoke)?
02. The Merkur (be) a very small planet.
03. What (Peter / think about)?
04. I usually (do) my homework in the afternoon.
05. The Francisco Josephinum castle (look) very old.
06. (water / boil) at 100° C?
07. At the moment mother (write) a letter.
08. (John / have) a bath right now?
09. Father usually (work) in the garage until 4 o'clock.
10. What (this sentence / mean)?