---Spacecraft “Discovery” has failed in the course of launch.
----_______? They have been preparing for the test.
| A．How come | B．When | C．How | D．Why not |
17. — I’m sorry. I ____ hurt you.
— Forget it.
| A．haven’t meant to | B．am not meant to | C．didn’t mean to | D．never mean to |
16. —Who____ it be that is knocking at the door?
—It ____ be Father, but I’m not sure.
| A．can; must | B．can; may | C．must; can | D．may; must |
15. —Why is Mr. Li so happy this morning?
—Because he was honored with a(n) ____ for excellence in teaching.
| A．present | B．gift | C．award | D．Reward |
14. I will ____ you for your kindness if you can help me to watch over my dog during my holiday.
| A．appreciate | B．appreciative | C．thank | D．grateful |
13. Don't ____ him to do anything. He's just a talker.
| A．devote to | B．according to | C．rely on | D．hope |