5.I have _________him for ten years.
A. been knowing
B. been known
C. known
D. knowing
第1题:
[A] knowing [B] to know [C] they know [D] know
此题属于语法题。knowing that为现在分词作状语,说明医生索要高价的原因。
全句可译为:医生知道保险公司会付账单就尽可能高地索价。
第2题:
第3题:
第4题:
A、are…being
B、is…being
C、has…been
D、have…been
第5题: