—Oh, it’s too difficult for me ____________ the task in such a short time.—Cheer up! I am sure you can.
He is highly praised _______ the teacher _______ his hard work.
I will perform _______ the piano in the concert to be held tonight.
His actions _______ his thoughts.
It’s easy for David to find the library because of his good ______ of direction.
There were some cases ______ women employees were fired when they were pregnant.