A

Every culture is riddled with unwritten rules，such as ones on punctuality（守时）.I'm British. Soon after moving to Switzerland，I（1）　 　（throw）a house﹣warming party and was greatly surprised when all 30 guests showed up （2）　 　（exact） on time. Years later，having moved to France. I turned up at the appointed hour for a dinner，only to find that no other guest（3）　 　（arrive） and my hostess was still in her sleeping suit.

B

Mangroves，known as "red forest" in China，grow between land and sea，characterised by their complex roots. When （4）　 　（see） from afar，the mangrove forests appear more splendid.

Mangroves can help soften waves and protect （5）　 　（city） from coastal winds. For these reasons，they are praised as "coastal guardians". Up to now，China （6）　 　（establish）a number of protected areas with mangroves.

C

Nina has run marathons in 32 countries. All of her runs have a guiding purpose: to call attention （7） global water issues. Nina recently finished her year﹣long series of runs in Chicago，（8）　 thousands were attending a water conference. She called for action （9）　 　（address）the struggles of people around the world （10） （face）"too little water or too dirty water". Her efforts have encouraged others to take part by running through a global campaign called "Run Blue".