-----The windows must have taken you quite a long time that day.
------Right. They for weeks.
| A．haven’t been cleaned | B．hadn’t been cleaned | C．didn’t clean | D．haven’t cleaned |
. The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.
| A．found out | B．pointed out | C．ruled out | D．carried out |
. Thousands of foreigners were______ to the Shanghai World Expo the day it opened.
| A．attended | B．attained | C．attracted | D．attached |
.Had she_________ her promise, she would have made it to Yale University.
| A．looked up to | B．lived up to | C．kept up with | D．come up with |
. Just as the clothes a person wears, the food he eats and the friends with whom he spends his time, his house his personality.
| A．resembles | B．strengthens | C．reflects | D．shapes |
. Duty is an act or a course of action that people you to take by social customs, law or religion.
| A．persuade | B．request | C．instruct | D．expect |