I arrive in London March fifth.[ ]
A. in
B. on
C. for
答案：B
________ twice, the postman refused to deliver our letters unless we chained our dog.
A．Being bitten
B．Bitten
C．Having bitten
D．To be bitten
肺不张合并支扩，或支扩合并肺炎、肺大泡等，CT均能明确显示。
