题目：暂停一秒输出。
import time
myD = {1:'a', 2:'b', 3:'c', 4:'d', 5:'e', 6:'f', 7:'g'}
for key,value in dict.items(myD):
print(key,value)
___________________#暂停一秒

A．time.sleep(1000)
B．time.delay(1)
C．time.delay(1000)
D．time.sleep(1)