The new policy will come ___ effect ___ the beginning of next month., A. in / at, B. into / at, C. into / in, D. to / on, The teacher has been working ___ the school ___ 2018 and is now responsible ___ training new teachers., A. at / since / for, B. in / for / of, C. at / for / for, D. on / since / of, The manager walked ___ the corridor, went ___ the office, and sat ___ his desk., A. across / into / at, B. along / into / at, C. through / to / on, D. along / in / on, The students were asked to hand in their assignments ___ Friday ___ 4 p.m., A. at / on, B. by / at, C. on / in, D. until / by, The school is located ___ the intersection ___ Main Street and Green Avenue., A. on / among, B. in / between, C. at / of, D. by / from, She walked ___ the bridge and continued ___ the river until she reached the village., A. through / across, B. along / through, C. over / into, D.across / along, The students have been waiting ___ the classroom ___ more than thirty minutes., A. at / since, B. in / for, C. on / during, D. into / by, The principal is concerned ___ the decline ___ students’ attendance ___ recent months., A. about / in / in, B. with / of / at, C. for / on / during, D. about / of / since, The train passed ___ the tunnel and emerged ___ the other side of the mountain., A. across / at, B. through / on, C. along / in, D. into / by, ___ the end of the semester, all students must submit their final projects ___ the specified deadline., A. In / until, B. At / by, C. On / at, D. By / in

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