The workers wouldn’t run the _______ in letting an unreliable person take charge of the factory. 

The twins are of similar _________ in music, though they are quite different in character.

Pine trees, of which there are almost one hundred _____, are found throughout the North Temperate Zone.

To our excitement，two ______ of students ______ a success after three years' hard work.

5. In our class, when the bell rang and the taacher closed his book, it was a        or everyone to stand up.