y directors ________, the boardmeeting had to be put off.

It is said that Columbus Day is __________ the arrival of Christopher Columbus in the New World in the USA.[ ]

Who helped you clean the classroom yesterday—_______. I did it all by myself.

This term, we have ________ new subject—physics. It’s interesting.

The traffic on the main streets has a longer greensignal than ______ on the small ones.