If steel is heavier than water， why are ships able to on the sea？（ ）
A．floatB．flyC．fallD．flow
﹣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
﹣I wonder______．﹣It will fall on a Saturday．（ ）
| A． |
how will National Day fall on this year |
| B． |
How National Day will fall on this year |
| C． |
What day will National Day fall on this year |
| D． |
What day National Day will fall on this year |