8. In 1936 in Berlin, basketball became an event at the      (奥林匹克）.

7. The zipper is used in our d       lives almost everywhere. We can see zippers on dresses,trou-
sers ,shoes and bags.

6. The tea was__________ (bring) to Korea and Japan during the 6th and 7th centuries and became popu?lar quickly. People are still drinking it now.

5. Cha Jing was t       into many languages which helped spread Chinese tea culture in the Western world.

4. Apple products are without       (怀疑)the ones that are most loved by Chinese       (顾 客).

3. We-chat ― a new way to communicate,took the place of short messages all of a      (突然).

2. It seems that        (电)is really such a great invention that has changed people's lives completely.

1. The       (先驱)of different inventions have changed the world greatly.

5. Potato chips,the much-loved       (脆)snack were invented by mistake.

4. The tea,one of the most famous drinks was      (discover)by accident.