单项选择题
The doctor told the students that an ________ disease was one that could be passed from one person to another.
单项选择题 There was a noisy ________ at the back of the hall when the speaker began his address.
单项选择题 The scientists were ________ as they had found not one but three viruses.
单项选择题 Having re-established his authority, tie was ready to renew his ________ more power.
