After a careful survey about the cause of the newly-built bridge, they finally came to a(n) _________ that it was due to the heavy rain.
| A．construction | B．motivation | C．conclusion | D．impression |
You will succeed in the end ________ you give up halfway.
| A．even if | B．as though | C．as long as | D．unless |
Paul is good, kind, hard-working and intelligent; _____, I can’t speak too highly of him.
| A．as a result | B．in a word | C．by the way | D．on the contrary |
To improve their oral English, everyone in the class is supposed to ______ actively in these discussions.
| A．participate | B．attend | C．enter | D．take |
Stronger and more lasting memories are likely to be formed ________a person is relaxed．
| A．where | B．unless | C．when | D．although |
Nearly four hundred supermarkets in Beijing are preparing to dim(使暗淡) their lights ________ the "Earth Hour 2010" on Saturday night．
| A．honor | B．honoring | C．to honor | D．having honored |