Keep quiet! I need complete__________ when I'm working．
Sorry， dad． I won't make any noise again．（ ）
A．trustB．silenceC．controlD．strength
﹣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
﹣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
﹣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
﹣I worked as a volunteer in the school library last Friday afternoon．
﹣Really？Can I go with you next time？（ ）
A．hadB．madeC．was
Ancient Greeks used a giant wooden horse to capture the city of Troy．（ ）
A．hugeB．wonderfulC．wide