Ancient Greeks used a giant wooden horse to capture the city of Troy．（　　）

A．hugeB．wonderfulC．wide

﹣I worked as a volunteer in the school library last Friday afternoon．

﹣Really？Can I go with you next time？（　　）

A．hadB．madeC．was

﹣I have difficulty in learning Chinese．Could you give me some help？

﹣Sure．Reading a lot will help you improve your Chinese．（　　）

A．questionsB．problemsC．tasks

﹣China's first large passenger plane C919 flew successfully on May 5．

﹣Yes．What's more，it was built on our own in Shanghai．（　　）

A．with some helpB．from our friends

C．by ourselves

﹣Hi，Bob!What's going on over there？

﹣Oh，Tom and Dick are playing chess，with a crowd of students watching them．（　　）

A．happeningB．appearingC．working