66. All of us have been to Hong Kong.（改为否定句）
__▲____ of us __▲____ been to Hong Kong.
67. The terrible flood led to a lot of problems. (对划线部分提问)
▲__ did the terrible flood ▲ to?
68. The king looked ugly with nothing on. (改为感叹句)
▲ ▲ the king looked with nothing on!
69. I went to bed after I finished my homework. （改为同义句）
I __▲____ go to bed __▲____ I finished my homework.
70. John runs fastest in his class. (改为同义句)
____▲____ else can run as ___▲_____ as John in his class.
71. At the beginning of the summer holiday, it is often rainy in Nanjing. (改为同义句)
At the beginning of the summer holiday, ____▲____ often ____▲____ in Nanjing.