3．Old Tom’s son was________of being a policeman though he was so weak and nearsighted.
A．worried B．anxious C．eager D．ambitious
解析：句意：“老Tom的儿子渴望当一名警察，尽管他身体弱小还近视。”考查be ambitious of...“渴望……”，故答案是D。
答案：D
4．Ever since the Greens moved to the country a year ago，they________better health.
A．are enjoying B．have been enjoying C．could have enjoyed D．had enjoyed
解析：句意：“从格林一家去年搬到这儿，他们的健康状况一直在好转。”由ever since的缘故，本题应用现在完成进行时，故排除A、C、D，故答案是B。
答案：B
