DURING THE PAST FEW YEARS, A BIG NUMBER OF PEOPLE _________IN NAT...

23) - DE THI TRAC NGHIEM TA CHUẨN
DE THI TRAC NGHIEM TA CHUẨN
23) During the past few years, a big number of people _________in natural disasters . A. have been killed B. have killed C. were being killed D. were killing