John and I＿＿＿friends for eight years.We first got to know each other at a Christmas party.But we＿＿＿＿＿ each other a couple of times before that.
| A．had been； have met | B．have been； have met |
| C．had been； had met | D．have been； had met |
It is reported that the United States uses ________ energy as the whole of Europe.
| A．as twice | B．twice much | C．twice much as | D．twice as much |
It was along the Mississippi River _________ Mark Twain spent much of his childhood.
| A．how | B．which | C．that | D．where |
At the meeting place of the Yangtze River and the Jialing River __________, one of the ten largest cities in the world.
| A．does Chongqing lies | B．Chongqing lies |
| C．does lie Chongqing | D．lies Chongqing |
Some insects __________ the color of their surroundings to protect themselves.
| A．take in | B．take on | C．take over | D．take off |
We promise ________attends the party a chance to have a photo taken with the movie star.
| A．whoever | B．whom | C．who | D．whomever |