— It’s said that dam is under construction.
— Yeah. It will take about half a year.
| A．不填；不填 | B．a; 不填 | C．a; the | D．不填； the |
Once harm ______ to the environment, it takes years to have the system recovered.
| A．does | B．is done | C．will be done | D．be done |
Staying in a hotel in Shanghai one day costs ____ renting a house in my hometown for a week.
| A．the three times price of | B．three times the price of |
| C．as much as three times | D．as much three times as |
Ted and his friends established a website offering useful information about thunderstorms ______ similar accidents happening.
| A．prevent | B．preventing | C．to prevent | D．prevented |
I don’t understand how you got a ticket. I always you a careful driver.
| A．think; are | B．am thinking | C．thought; were | D．think; were |