_______about wild plants that they decided 
to make a trip to Madagascar for further research.
| A．So curious the couple was | B．So curious were the couple |
| C．How curious the couple were | D．The couple was such curious |
Lectures were _____ so students could be more focused on their study for the finals.
| A．called off | B．broken off | C．blown off | D．set off |
He _____ on the bench, with his head down and his eyes _____ on the ground.
| A．was seated; fixing | B．was seated; fixed |
| C．seated; fixing | D．seating; fixed |
Every year, millions of people visit the Palace Museum, and many of __ are foreigners.
| A．them | B．that | C．whom | D．what |
—We really enjoyed ourselves at the party. Thanks again, Mr. and Mrs. White.
—_____. Just drop in whenever you feel like it.
| A．With pleasure | B．Our great honour |
| C．Nice having you here | D．Nice you are here |
—Can you describe _____ it happened?
—Yes, I was riding on my bike _____ a car knocked me down from behind.
| A．when; as | B．how; as | C．how; when | D．how; while |