________ isthatblueshirt?—$23.6.[ ]

I will send you an e-mail as soon as I ______ in Canada. 　　[ ]

When you post a letter, don’t forget to put a stamp the envelope.[ ]

Although ________ after the Civil War, the American blacks still took no important role in the white Americans except as servants and laborers.

Oh! I came to school in such a hurry and forgot to bring any books with me. —Never mind. You can use ________.