Our teacher is always busy preparing lessons until 11 o’clock at night, _____we students have gone to sleep.
Shall Mary come to the concert with us?-Not she has finished her paper.
Water, _______enough, can change into vapour quickly.
The man stopped from time to time_______whether he was being followed.
Doctors have said that as many as 50% of patients don’t take medicine_______.
You may take them all home_______.