—Did you know ______ just now?
—Their plane didn't take off on time because of the thick fog.
| A．what did they happen | B．what happened to them |
| C．what they happened | D．what they have happened |
Do you know where Jimmy is? I ______ him for such a long time.
| A．don't see | B．didn't see |
| C．haven't seen | D．won't see |
—How did the writer win the prize?
—He worked day and night for two years. ______ . he succeeded.
| A．In the way | B．By the way |
| C．On the way | D．In this way |
—Which of the two new books do you like better?
—I like ______ of them, because they're not useful to me.
| A．both | B．either | C．all | D．neither |
Are you sure the news ______ you received from the Internet is true?
| A．that | B．where | C．what | D．how |