My parents never remember my phone number，and they always________ look it up every time they call me.
A．can B．must C．should D．have to
My parents never remember my phone number，and they always________ look it up every time they call me.
A．can B．must C．should D．have to
D 根据句意“我父母从来记不住我的电话号码，每次打电话都必须查号码”，可知是指“不得不”，因此用have to。