Read the following paragraph carefully and answer the questions below it

 I. Read the following paragraph carefully and answer the questions below it.

     (1) The shuttle Columbia marked the beginning of a new era in space. (2) Early space explorations involved short flight into orbit and eventually to the moon. (3) However scientists was more concerned about whether such flights could be done at all, than about using space for new scientific research. (4) The shuttle meant that a continue link to the world of space could be maintained, and eventual a space station could be constructed. (5) With the Columbia, humans were first able to examine the uses of space itself for scientific purposes.

(Adapted from http://grammar.about.com/od/developingparagraphs/a/samdescpars.htm)

1. Does the paragraph unify? If it does not, which sentence does not support the topic sentence?
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2. Does the paragraph have a topic sentence? If it does, which sentence is it?
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3. There are 5 mistakes in the paragraph. Underline and correct them. One has been done for
you.
i) flight → flights
ii) …………………………………………………………………………………………..
iii) …………………………………………………………………………………………..
iv) …………………………………………………………………………………………..
v) …………………………………………………………………………………………..