—Could you come to my birthday party?—Sorry, I ________.A. couldn’t B. can’t C. can
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.
Theteacherspokeofsomewritersandsomebooks________we need to know.