—I'm afraid it's going to rain this afternoon.
—________ Look at the dark and cloudy sky.
| A．Not really. | B．Is it? |
| C．Why not? | D．I guess so. |
New iPhone goes on sale on Friday with ____ bigger screen and 4G wireless technology, as _____ company seeks to keep its competitiveness.
| A．a; the | B．a; a |
| C．the; the | D．the; a |
Only when he returned home ______ what had happened.
| A．did he realize |
| B．he realized |
| C．he did realize |
| D．has he realized |
He was fortunate ____ he did not get injured in the car accident.
| A．but that | B．except that |
| C．because of that | D．in that |
He hasn’t decided _____ he will go abroad next year.
| A．whether | B．when |
| C．where | D．why |
The old man turned his business over to his younger son, ________made his elder son discouraged.
| A．who | B．what |
| C．that | D．which |