1

Problem

As British scientist Peter Whibberley has observed, “The Earth is not a very good timekeeper.” Earth’s slightly irregular rotation rate means that measurements of time must be periodically adjusted. Specifically, an extra “leap second” (the 86,401st second of the day) is____time-based on the planet’s rotation lags a full nine-tenths of a second behind time kept by precise atomic clocks.

Which choice completes the text so that it conforms to the conventions of Standard English?

2

Clue

A short passage explicit the information to analyze, and interpret the main idea.

3

Hint

Special attention to the facts and details draws out the main idea.

4

Sumup

Please summarize steps

Choices

6

Choice-A

Choice A is correct because this option correctly introduces a conditional clause with "whenever," indicating the specific condition under which the leap second is added. It maintains proper sentence structure and punctuation

Correct added whenever

7

Choice-B

Choice B is incorrect because it improperly places a comma before "whenever," disrupting the flow and clarity of the sentence.

Wrong added,whenever

8

Choice-C

Choice C is incorrect because the period (.) between "added" and "whenever" is incorrect in Standard English. When forming a compound word like "added whenever," it should not be separated by a period.

Wrong added.whenever

9

Choice-D

Choice D is incorrect because it disrupts the logical order and flow of the sentence, creating confusion.

Wrong whenever,added

10

Step

The most logical text for the given passage - added whenever

11

Answer

Option

A

12

Sumup

Please summarize choices