—All the volunteers were very tired, but of them took a rest.—They were busy looking for the missing people.
The first class begins _______ 8 o’clock ______ the morning.
_______the past two months he has been busy with his school work.
________last Saturday, we had two football matches with Class Two.
We will be in Nanjing _____ Tuesday ______Thursday.
Mr. Black will visit our new school building ______ two days.