____I will go abroad for further study or not is my top concern these days.
| A．If | B．Whether | C．What | D．Where |
The company __________ a rise in salary for years, but nothing has happened.
| A．promises | B．promised |
| C．has promised | D．has been promising |
I'm glad to see that you __________ a lot of progress since I__________ you last.
| A．will make; have met | B．have been making; met |
| C．had made; met | D．have made; meeting |
—Did you find the missing couple in the mountain yesterday?
—No, but we __________ to get in touch with them ever since.
| A．have tried | B．have been trying | C．had tried | D．had been trying |
__________ my sister three times today but her line was always busy every time I phoned her then.
| A．I'd phoned | B．I've been phoning | C．I've phoned | D．I was phoning |
She ought to stop working, she has a headache because she __________ too long.
| A．has been reading | B．had read | C．is reading | D．read |