______ has helped to save the drowning girl is worth praising.
Prime Minister’s speech is deeply impressed _________ my memory.
If we ________ your knowledge with my experience, we are sure to succeed.
—Would you like some more chicken? —No, thanks. I am _________ a diet and I’m trying to _________ weight.
_______ you’ve got lots of homework to do, we won’t hold a party this weekend.
The city of Nanjing is _______ the Yangtze River and Japan is_______ the east of China.