Again, a very nice summary. Thanks! My opinions:

Discussions:

1. "the Middle Ages" is definitely better.

2. 第一，二句應用被動語氣，但不太好，不喜歡這種用法。

Two unequal stones were dropped to the ground at the same time.
Two unequal stones were dropped on the ground at the same time.

Both #3 and #4 are acceptable.

 

 

 

 

Both #3 and

 

所有跟帖： 

• Thank you, Dr. NewVoice. -EnLearner- ♀ (351 bytes) () 08/20/2011 postreply 07:15:58

• Oops, I only looked at grammar, -NewVoice- ♀ (684 bytes) () 08/20/2011 postreply 09:45:46

• just learned: release -> let fall, haha -jennea- ♀ (727 bytes) () 08/20/2011 postreply 09:57:45

• Thanks! Jennea, you are so thorough! Learned. -NewVoice- ♀ (0 bytes) () 08/20/2011 postreply 10:24:47

• 我啥都google，成習慣了～ -jennea- ♀ (0 bytes) () 08/20/2011 postreply 10:50:53

• 關於被動語態 -全國牙防組- ♂ (133 bytes) () 08/20/2011 postreply 08:51:01

• 借地謝謝牙醫。你的t和tr的讀法說得很好，我一下解決了以前t結尾輔音發不好的問題。 -beautifulwind- ♀ (126 bytes) () 08/20/2011 postreply 08:58:37

• 你那個choi知道怎麽回事了沒有啊？ -jennea- ♀ (0 bytes) () 08/20/2011 postreply 09:16:43

• 謝謝jennea！choi經過泡泡和你的提示，我的發音得到了native speaker的肯定。 -beautifulwind- ♀ (116 bytes) () 08/20/2011 postreply 09:24:20

• 不用謝。就是因為我自己也不肯定，所以才想知道你的答案～～ -jennea- ♀ (0 bytes) () 08/20/2011 postreply 09:29:54

• 不用謝 -全國牙防組- ♂ (67 bytes) () 08/20/2011 postreply 09:28:15

• 愚教授一直是很大方的。 -beautifulwind- ♀ (0 bytes) () 08/20/2011 postreply 09:32:58

• I did not know this trend. Learned! Thanks! -NewVoice- ♀ (0 bytes) () 08/20/2011 postreply 09:47:38