97-1-34 & 38...笨问

groundkeeper

1.Because of its low cholesterol content, margarine is a widely used substitute from butter.

key: C....why not D

2. Most authorities consider both dreaming while sleep and daydreaming to be forms of fantasy.

key:B....how to correct that......

谢谢！！

likui

以下是引用groundkeeper在2004-12-8 20:33:00的发言：

1.Because of its low cholesterol content, margarine is a widely used substitute from butter.

key: C....why not D

答案应该是D呀，改成for；这位兄弟，你的答案错了吧。

2. Most authorities consider both dreaming while sleep and daydreaming to be forms of fantasy.

key:B....how to correct that......

while有两个用法：

1 表示对比

2 近乎when，但是表示经历时间较短

while后接从句，或者doing

改成during

groundkeeper

thanks..likui