单项选择题
An enlarged prostate may ______ the bladder and pinch off the urethra, causing pain and difficulty with urination.
单项选择题 Bill couldn't ______ an answer when the teacher asked him why he was late.
单项选择题 The news you told me the other day has yet to be ______ .
单项选择题 Quite a lot of people watch TV only to ______ time.
