... mammals d. Like all mammal > c 100 . So far there is no vaccine in sight for the common cold. a. or curing b. has cured c. or cure d. having cured > c 101 . The Louisiana Territory, an ... b 102 . Despite claims that filters and low-tar tobacco make smoking somewhat safer, in fact they only marginally reduce, eliminate the hazards. a. none b. no c. not d. nor > c 103 . ... Benjamin Banneker helped reproduce the original plans. a. When b. During c. If as d. How > a 104 . Few natural elements exist in that they are rarely seen in their natural environments. a....