There ___when we came here last time, which was said to date back to 773 BC.
A. stood a great castle B. does stand a great castle
C. stands a great castle D. did stand a great castle
-Why does the Lake smell terrible?
-Because large quantities of water .
| A．have polluted | B．is being polluted | C．has been polluted | D．have been polluted |
Daniel's family their holiday in Huangshan this time next week.
| A．are enjoying | B．are to enjoy |
| C．will enjoy | D．will be enjoying |
With the help of high technology, more and more new substances ______ in the past years.
| A．discovered | B．have discovered |
| C．had been discovered | D．have been discovered |
I got caught in the rain and my suit _______.
| A．has ruined | B．had ruined |
| C．has been ruined | D．had been ruined |
The wet weather will continue tomorrow, when a cold front ______ to arrive.
| A．is expected | B．is expecting | C．expects | D．will be expected |