---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 |
My friend Mary is _____ beautiful girl and _____ girl everyone likes to work with.
| A．a, a | B．a, the |
| C．the, a | D．the, the |
. He is very busy. I don’t know if he _____ or not tomorrow.
| A．come | B．comes |
| C．will come | D．is coming |
“Have you seen _______ new bike? I put it here just now.” “Is it _______ white one? A boy has ridden it away.”
| A．a; a | B．a; the |
| C．the; the | D．the; a |
“What place is it？” “Haven’t you found out we _____ back where we ______？”
| A．were, had been | B．have been, are |
| C．are, were | D．are, had been |
“Have you seen _____ pen? I left it here this morning.” “Is it _____ black one? I found it in the corner.”
| A．a, the | B．the, the |
| C．a, a | D．the, a |