TOEFL EXERCISE (Skills 20-23)

TOEFL EXERCISE (Skills 20-23): Choose the letter of the word or group of words that best completes the sentence.

1	Among bees ________ a highly elaborate form of communication. A.                 occur B.                 occurs C.                  it occurs D.                 they occur
2	________ heated by solar energy have special collectors on the roofs to trap sunlight. A.                A home is B.                  Homes are C.                  A home D.                 homes
3	Each number binary (A) system are (B) formed (C) from only two (D) symbols.
4	Scientists at the medical center is trying (A) to determine (B) if there is (C) a relationship between saccharine and cancer (D).
5	On the rim (A) of the Kilauea volcano in the Hawaiian Islands (B) are (C) a hotel called (D) the Volcano Hotel.
6	The great digital (A) advances of the electronic age, such as integrated circuitry (B) and a microcomputer, has (C) been planted (D) in tiny chips.
7	There are many frequently (A) mentioned (B) reasons why one out of four arrests (C) involve (D) a juvenile.
8	Kepler’s Laws, principles outlining planetary movement, was (A) formulated (B) based (C) on observations made (D) without a telescope.
9	Only with a two-thirds vote (A) by both houses are (B) the U.S. Congress able to (C) override a presidential veto (D).
10	Of all the evidence that has piled (A) up since Webster’s paper was published, there is (B) no new (C) ideas to contradict (D) his original theory.

ANSWER KEY

1	B
2	D
3	B	is
4	A	are trying
5	C	is
6	C	have
7	D	involves
8	A	were
9	B	is
10	B	are