We should know that we can only reach the top if we are ready to ____ and learn from failure.
Which ______ more fat, cream or rice?
The doctor suggested he ______.
They are considering______ they should do the experiment .
Lincoln, ______ President of ______ United States, was assasinated(暗杀)on April 14th , 1865 .
Why ______ a bad idea to ask Amy for advice?