THE DEATH RATE WOULD DECREASE IF HYGIENIC CONDITIONS IMPROVED....

3. - ĐỀ CƯƠNG ÔN TẬP ANH 8 LẦN 3
ĐỀ CƯƠNG ÔN TẬP ANH 8 LẦN 3
3. The death rate would decrease if hygienic conditions improved.A. was B. is C. were D. had been