—Why were you not at the concert last night？
— I _________a close game between Seattle Sonics and Miami Bucks.
| A．watched | B．had watched | C．was watching | D．have been watching |
Once environment damage _____, it takes many years for the system to recover.
| A．has done | B．is to do | C．does | D．is done |
As _____ announced in today's papers, the Shanghai Export Commoditiser Fair is also openon Sunday.
| A．being | B．is | C．to be | D．been |
–It must have been lots of fun riding round in a car.
–Yes, you know this was the first time that _____ round in my own car.
| A．I rode | B．I should have ridden |
| C．I’ve been riding | D．I’d ridden |
Until then, his family _____ from him for six months.
| A．didn't hear | B．hasn't been hearing |
| C．hasn't heard | D．hadn't heard |
It's reported that by the end of this month the output of cement in the factory _____ by about 10%.
| A．will have risen | B．has risen | C．has been risen | D．will be rising |