A.a ![]() | B.these ![]() | C.an |
A.is;in | B.are; in | C.be; in |
A.at | B.in | C.before |
A.go | B.stop and wait | C.slow down |
A.Keep | B.Keeping | C.To keep | D.Keeps |
A.to stand | B.stand | C.standing | D.stands |
A.an | B.a | C.the |
A.by subway | B.on foot |