One of is followed by a plural noun, but a singular verb.
e.g. One of my
friends is here.
One of the
best things to do is watch movies on a big screen.
Two of and other expressions are also followed by a plural
noun but a plural verb.
e.g. Two of the
best places to visit are the CN Tower and the ROM.
Half of the
people are here.
Two thirds
of the guests have arrived.
