The size of the generation gap seems to be spreading with ____ rapid changes in technology, in education, in transportation and in communication that are taking place all over ____ globe.
— Did your sister pass the exam? — She failed and is in low spirits. — I'm sorry for her. — ______.
He is only too ready to help others, seldom, ______, refusing them when they turn to him.
— How’s your tour around the North Lake? Is it beautiful? — It ______ be, but it is now heavily polluted.
The house could fall down soon if no one ______ some quick repair work.
Right now you can pay ______ you had to several years ago for a cool computer.