It is kind of you to reply to my letter without ().A、denyingB、pauseC、delayD、thinking

American people divide their days into several blocks of time, and plan different activities (41) () different times. American time is “on the dot”(准确地)). If something is supposed to happen at Eight o’clock, it will begin at eight. Americans value promptness(准时)and may become angry if a person is more than 15 minutes late (42) () a good reason. If you know you are going to be late, call in advance and let someone know. (43) () you arrive late, you should apologize and explain why. Americans arrive (44) () time for doctors’ appointments. The doctor may keep you (45) (), but if you keep the doctor waiting, you may get a bill with the doctor’s time!

(1). A.for B.waiting C.on D.if E.without

(2). A.for B.waiting C.on D.if E.without

(3). A.for B.waiting C.on D.if E.without

(4). A.for B.waiting C.on D.if E.without

(5). A.for B.waiting C.on D.if E.without

13．

A．Except

B．Instead

C．With

D．Without

关于下面函数，哪一个是错误描述?defcount_letter_number(string):letter_count=0digit_count=0forchinstring:

if'a'<=ch<='z'or'A'<=ch<='Z':letter_count+=1elif'0'<=ch<='9':digit_count+=1

returnletter_count,digit_count

A.函数能统计字符串中英文字母出现的次数

B.letter_count+=1可以写做letter_count=letter_count+1

C.letter_count+=1可以写做letter_count++

D.函数能统计字符串中数字出现的次数