Common Conjunctive Adverbs: accordingly, consequently, furthermore, however, likewise, meanwhile, nevertheless, nonetheless, otherwise, therefore, thus, unfortunately
Common Transitional Phrases: for example, in addition, in other words, as a result, on the other hand, as a matter of fact, in conclusion.

7) . Space travel has advanced tremendously in the past twenty-five years. What we know about Mercury is limited. (Use a semicolon and conjunctive adverb.)