(12) The teacher told us ___________.

　　A. don't play on the road

　　B. not be late again

　　C. come to school on foot

　　D. to cross the road carefully

　　(13) Could you show us _________ a bike?

　　A. how to mend　　　　　　B. what to buy

　　C. where to go　　　　　　D. how many to buy

　　(14) —Where is your father? We haven't seen each other for weeks.

　　— _________.

　　A. He has been to America

　　B. He has gone to England

　　C. He is going to Australia

　　D. He would visit my grandparents

　　(15) They have __________ since the factory opened.

　　A. left the school　　　　　　B. joined the team

　　C. become a worker　　　　　　D. worked here

　　(16) The Young Pioneers didn't know __________.

　　A. where will they go

　　B. what they would do next

　　C. when could they go

　　D. how did they get there

　　Key: (1) — (5) CDABB  (6) — (10) CBBCA  (11) — (15) DDABD  (16) B