问题
Milk will turn sour soon on hot days ______ it is stored in the refrigerator
A:is
B:was
C:had been
D:has been
B:was
C:had been
D:has been
正确答案是：
同类题型
Tom’s head feels very hot now.—Maybe he ________.Please take him to go to a doctor.
The ______ studentstanding at the gate speaks very good Chinese
ite a number of children, theirteachers’ advice is more acceptable than ____ of their parents
After a few courses on painting, Helen said she would ________ oil painting in her spare time.