Stephen Hawking was famous a scientist, he made a great contribution to the world, and he died March 14 th, 2018.( )
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Ty to sing more English songs , and you will find it interesting _______ a foreign language.
We all need partners _______.
The river is too wide for the swimmers _______________.
I am happy with my old friends today.
The policeman asked us _____him send the old man to the hospital.