--It’s about two _________ walk.

—what_______________ your mother like?—She likes films and she often_________________ films on computer.

—We have red and yellow T-shirts. Which color do you like? —I’m afraid      . I think blue will be OK.

—The story is not easy for students to understand.  —I agree with you, ________ it’s not very long.

—Can you come on Monday or Tuesday?—I 'm afraid ________ day is possible.