12．聽第15段材料，回答第19～22小題．
19．How old is Frank？
A.15 years old．
B.20 years old．
C.25 years old．
20．When did Frank lose his watch？
A．Yesterday．
B．This morning．
C．Last week．
21．What does Frank's mother criticize him for？
A．He is too careless．
B．He is too young．
C．He is too lazy．
22．What's Frank going to do？
A．Eat noodles．
B．Turn off the TV．
C．Clean the kitchen．
