Changing the design of a new product may ______ therisk of its production in the market.

When I went home after work, I found my house ______ but strangely, nothing had been stolen.

What’s your opinion of Mr．Li’s request that we ______ spend half an hour reading English aloud every morning?

______this difficulty is overcome, other problems will be easy to solve

Hosting the 31st Olympics is________great honor and the Brazilians are working hard to make the games________success