What kind of movies do you like?　— I like the movies ________are about Chinese history.

Who taught ________ to write the computer programs? —Nobody. She learned it by __________.

Excuse me, have you seen ________ lovely cat?—Is it ________ black cat? Just now I saw it sleeping under the table.

I really found it difficult to read, for his eyesight was beginning to________.

Help yourself to some fish.—Thanks. Oh, it tastes so ___________.