49. I don’t know whether small oranges are sweeter than big ______.
| A．those | B．ones | C．one | D．that |
Mom，don’t you think it's OK to play once in a while ____________ it doesn’t affect my studies?
| A．even if | B．unless |
| C．so that | D．as long as |
An individual human existence should be like a river-small at first, narrowly contained within its banks, and＿＿＿passionately past rocks and over waterfalls.
| A．to rush | B．rushing |
| C．rushed | D．rush |
In March, cherry blossoms（樱花）on both sides of East Beijing Road give the city of Nanjing an early ＿＿of spring.
| A．taste | B．theme |
| C．sense | D．setting |
Lucy found one of her friends had been ____ after she finished the invitations to her wedding party.
| A．taken out | B．put out |
| C．picked out | D．left out |
The government should protect the old valuable buildings ____ they are not in harmony with the modern ones nearby．
| A．even though | B．as if |
| C．even so | D．now that |