66) Science and technology is now considered __ be the instruments of all comforts and prosperity.
Choose the correct preposition.

A) of
B) for
C) to
D) by

67) The ticket collector __ the passenger, “Please show me your ticket.”
Choose the correct option.

A) told to
B) asked to
C) asked for
D) asked

68) Osmium is __ of all known metals.
Choose the correct option.

A) a heaviest
B) the heaviest
C) an heaviest
D) heaviest

69) Rajneesh is a friend of __
Identify the appropriate pronoun.

A) mine
B) my
C) myself
D) me

70) They __ in New York for the past ten years.

A) are staying
B) had being staying
C) have been staying
D) has been staying