单项选择题
Smith failed to ______ for the deficit in the company's...
单项选择题Smith failed to ______ for the deficit in the company's hank balance.
Difficult as it is, English study is in the long run __...
单项选择题Difficult as it is, English study is in the long run ______ to a learner in his or her career development.
Cigarette smoking is a great health ______ and may lead...
单项选择题Cigarette smoking is a great health ______ and may lead to fatal diseases.
