In summer, food goes bad easily____ it is put in the refrigerator. A. until B.if C. unless D. event if
A.A
B.B
C.C
D.D
正确答案是C
In summer, food goes bad easily____ it is put in the refrigerator. A. until B.if C. unless D. event if
A.A
B.B
C.C
D.D
正确答案是C