The task is very difficult. I wonder whether we will be able to finish it in the ________ of any other helpers.
Shall Mary come to the concert with us? -Notshe 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_______.