練習題： 　　1 To make donations or for more information, please _____________________________ .

　　2. Please come here at ten tomorrow morning _______________________________ .

　　參考答案：

　　1. To make donations or for more information, please contact us at the following address

　　該句的后半部分是由please祈使句，please后面應該跟原形動詞。與某人聯系一般用contact表達，介詞at與其一起構成介賓短語，修飾contact。

　　2. Please come here at ten tomorrow morning if it is convenient for you/at your convenience

　　本題主要考查if 引導的條件狀語從句，你方便的話用it is convenient for you/at your convenience表示。