Sentence1: I've always wanted to be able to bike thirty miles at one time. Sentence2: Right now I can only bike about twenty miles at once. Sentence3: I got myself a biking trainer who helped me make progress. Sentence4: I worked hard for a few months and ate all the right foods. 
 (A) Now I can bike 30 miles. (B) I am so out of shape I can't even bike a mile.
B