Two things to keep in mind when you're deciding whether to use formal or informal english are
a. the author and the audience.
b. the occasion and the audience.
c. the reader and the location.
d. the opinion and the occasion.

Questions 1–2: identify the dependent clause and circle the independent clause. 1. since carmen was so hungry, she stopped at the deli and bought a sandwich. 2. the train was running late as usual, so kristen decided to call a taxi.