Mrs. White found her husband surrounded by letters and papers and ________ very worried.
| A．look | B．looks | C．looking | D．to look |
—How long are you staying there?
—_________depends.
| A．It | B．Anything | C．This | D．Everything |
．______was known to them all that William had broken his promise______ he would give each of them a gift.
| A．As, which | B．What, that | C．It , that | D．It , which |
．—When can we come to visit you?
—Anytime you feel like________.
| A．one | B．it | C．so | D．that |
Really great people always see the best in others; it is the little man who looks for the worst and finds_________.
| A．one | B．it | C．that | D．them |
．No one knows exactly when our ancestors started talking，but new evidence suggests _______might have happened a long time ago．
| A．which | B．what | C．it | D．they |