______ our teacher is ill, _______ he still come to our class to teach us.

What ______ me was that there was a ______ look on her face due to the ______ problem.

l never forget those years _______ I lived inthe country with the farmers, ______ has a great effect on my life.

She did the exercise again. She forgot ____ it.

He went home for lunch ____ the clock struck twelve.