单项选择题
He often ______ in his speech.A．rumblesB．stumblesC．tumb...
单项选择题He often ______ in his speech.
They seized Belgrade, though only after having encounte...
单项选择题They seized Belgrade, though only after having encountered a stubborn ______.
Although students may be in a ______ position, teachers...
单项选择题Although students may be in a ______ position, teachers shall treat them as equals.
