Car manufacturers and governments have been eagerly seeking a replacement for the automobile's main source of power, the internal-combustion engine. By far the most promising alternative source of energy for cars is the hydrogen-based fuel-cell engine, wh

The reading states that replacement of internal-combustion engine with a fuel cell by using a hydrogen as a source of power, is more beneficial and provides three reasons for support. However, the professor refutes each of author's point and states that hydrogen is not a solution to this problem.

First of all, the reading claims that hydrogen can be readily available from renewable sources such as water and natural gas. However, the professor posits that hydrogen is not easily available. To run the fuel cell, hydrogen has to be in pure liquid state which is highly artificial. So, technical...

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Average: 9 (1 vote)
Essay Categories
Integrated TOEFL Writing

Attribute Value Ideal
Score: 26 in 30
Category: Very Good Excellent
No. of Grammatical Errors: 0 2
No. of Spelling Errors: 1 2
No. of Sentences: 12 12
No. of Words: 237 250
No. of Characters: 1221 1200
No. of Different Words: 112 150
Fourth Root of Number of Words: 3.924 4.2
Average Word Length: 5.152 4.6
Word Length SD: 2.679 2.4
No. of Words greater than 5 chars: 91 80
No. of Words greater than 6 chars: 70 60
No. of Words greater than 7 chars: 47 40
No. of Words greater than 8 chars: 22 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 19.75 21.0
Sentence Length SD: 4.675 7.5
Use of Discourse Markers (%): 0.667 0.12
Sentence-Text Coherence: 0.451 0.35
Sentence-Para Coherence: 0.644 0.50
Sentence-Sentence Coherence: 0.168 0.07
Number of Paragraphs: 4 4