A.a; at | B.an ; in | C.the ; on | D.×;on |
A.to | B.of | C.at | D.in |
A.to | B.in | C.on | D.for |
A.by subway | B.on foot | C.ride my bike | D.by bus |
A.How long, in | B.How many times, on | C.How often, on | D.How long, on |
A.to, on, in | B.with, about, m | C.to, about, on | D.with, on, to |
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