1. Physics ________ one of my favorite subjects.
A) be
B) to be
C) is
D) are

2. There are some books on the table, which ________ about fish.
A) does
B) do
C) is
D) are

3. A third of the students ________ passed the test.
A) are
B) have
C) has
D) is

4. The bus comes here ________ 30 minutes.
A) each
B) another
C) every
D) all