--Sam, come downstairs, please. I need your help.
--Sorry, Mum. I _____ on the phone.
A.talked B. am talking C.was talking.
You must wear strong shoes and socks ____ you climb the mountains.
A.whatever B.wherever C.whenever
Friends and neighbors become _____ when they visit each other more often.
A.farther B.closer C.stronger
—How soon can you finish the work?
---With the help of the machine, two weeks ______ enough for me.
A.is B.are C.was
—What do you think of school safety, Mr. Zhao?
--School safety is more important than any other thing, so our school must take it _____.
A.carefully B.seriously C.specially
--____ is Mount Tai, Susan?
--Oh, it is 1,532 meters high.
A.How long B.How wide C.How high
