A middle-aged woman came ________ to the bus stop only ______ the bus had gone.
Jim went to answer the phone. _____, Harry started to prepare lunch.
When ______questions in class,one should answer them as clearly as possible.
After the bell rings,which indicates the ending of the exam,you_____stay where you are until all your papers are collected.
—You were not listening;what troubled you?—I my coming math exam.
I am amazed at someone so rich _____ difficulty in paying what he owes you.