Final answer:
The appropriate error to be put in the except clause is ZeroDivisionError. If the variable 'i' takes a value of 0, the except block will execute and print a custom message.
Step-by-step explanation:
The appropriate error to be put in the except clause is ZeroDivisionError. This error occurs when a division or modulo operation is performed with a divisor of zero. In the given code, it would be raised if the variable 'i' takes a value of 0, resulting in a division by zero. Here's the corrected code:
for i in range(-3, 7):
 try:
 print(7 / i)
 except ZeroDivisionError:
 print('Cannot divide by zero')
In this updated code, if 'i' is 0, the 
except
 block will execute and print a custom message.