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Grammar Focus

A Check the correct sentences.

1 a. There are an average of over 1,000 tornadoes every year in the U.S.
b. There is an average of over 1,000 tornadoes every year in the U.S.

2 a. The Tri-State Tornado of March 18, 1925, was the deadliest tornado.

b. The Tri-State Tornado of March 18, 1925, were the deadliest tornado.

3 a. Winds can reach speeds of 500km per hour or more.

b. Winds can reaches speeds of 500km per hour or more.

4 a. According into the report, 689 people were killed by this tornado.

b. According to the report, 689 people were killed by this tornado.

5 a. A tornado is a type of violent windstorm which a rapidly rotating

column of air spins very fast.
b. A tornado is a type of violent windstorm in which a rapidly rotating

column of air spins very fast.

B Choose the correct words to complete the sentences.

1 But they are very destructive and even ( dead / deadly ).

2 It develops a rotational wind that ( touch / touches ) the ground at high

speed.

3 Tornadoes occur ( individual / individually ) within a short period of time.

4 Tornado Alley is an area that ( get / gets ) many destructive tornadoes.

5 Tornadoes ( develop / develops ) within a large scale low-pressure
system.

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