THE POLICE STARTED INVESTIGATING THE CASE A WEEK AGO.WHICH SENTEN...

121. The police started investigating the case a week ago.Which sentence express the same idea as the above?A. The police have investigated the case for aweek.B. The police has investigated the case for aweek.C. The police have investigated the case since a week. D Thepolice has investigated the case for a week.Immediately, after his arrival, things went wrong. Which sentence express the same idea as theabove?A. When he was arriving, things went wrongB. Because he arrived, things still went wrongC. No longer did he arrive, but things still wentwrongD. No sooner had he arrived that things wentwrong