单项选择题
He ______ the mud with a stick, looking for the ring he had dropped.
单项选择题 As foreign minister in the 1960s he ______ closer ties with China,
单项选择题 He entered the classroom with ______ steps.
单项选择题 There is not much ______ in this building; you can hear what a person in the next room is say ing quite clearly.
