问题
If you feel tired and sick of fat food, that is ______ you have to go to the hospital for medical examination.
A:why
B:whether
C:when
D:what
B:whether
C:when
D:what
正确答案是：
同类题型
me goes by, Mother’s hair is turninggray and the wrinkles on her face deeper.
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Darkness, so we had to stop our journey and stayed on a farm.
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