review yesterday's lesson.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.

L41-Let's drop the subjet.