1. A student has studied English for a few years. He may have a vocabulary of thousands of words. (who)
2. Between formal and colloquial English there is unmarked English. It is neither so literary and serious as
formal English, nor so casual and free as colloquial English. (which)
3. He bought a jeep. His friend advised him against it. (although)
4. Good writing requires general and abstract words as well as specific and concrete ones. It is the latter
that make writing vivid, real and clear. (though)
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5. It was raining hard. They could not work in the fields. (so ... that)
6. The politician is concerned with successful elections. The statesman is interested in the future of his
people. (whereas)
7. The results of the experiment were successful. The school refused to give any help. (although)
8. He chose to study computer science. Computer science has good employment
prospects.(because of)
9. Mary walked very slowly. She did not catch the train. (if)
10. He is not coming. The meeting will be put off till next week. (in the event of)