Only when he put his foot into the river________that the water was too cold to swim in.
| A．he realized | B．did he realize |
| C．had he realized | D．he had realized |
Niagara Falls is a great tourist _______,drawing millions of visitors every day.
| A．attention | B．attraction |
| C．appointment | D．arrangement |
The natural _______ of the mountains is beautiful.
| A．scene | B．scenery |
| C．sceneries | D．scenes |
I have some _______ in my pocket. In other words, I have some _______ on me.
| A．coin；change | B．coins；change |
| C．coin；changes | D．coins；changes |
Oh, John! _______ you gave us!
| A．How a pleasant surprise |
| B．How pleasant surprise |
| C．What a pleasant surprise |
| D．What pleasant surprise |
This book tells _______ life story of John Smith, who left _______ school and worked for a newspaper at the age of 16.
| A．the; the | B．a; the |
| C．the; / | D．a; / |