They always_______________ in the school activities .
A. took a active part
B. take an active part
C. takes part
D. active take part
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John exercises 2 hours every day in order to ________________.
A. stay in shape
B. stay shape
C. healthy
D. health
To make your voice _______, you should talk as loud as you can.
A. hear
B. hearing
C. heard
D. to hear
前列腺增生患者最早出现的症状是
A. 尿潴留
B. 血尿
C. 尿频
D. 尿急
E. 尿痛
患者，男性，60岁，因夜尿次数增多伴进行性排尿困难4个月入院。直肠指诊发现前列腺明显肿大，血清PSA测定未见明显升高。首先应考虑为
A. 膀胱结石
B. 前列腺癌
C. 前列腺增生
D. 膀胱炎
E. 肾结核
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