答案：C

3. ________ automatically,the e-mail will be received by all the club members.

A.Mailed out B.Mailing out C.To be mailed out D.Having mailed out

提示：由上下文可知，the mail与mail out之间为逻辑上的动宾关系，故须用过去分词。

答案：A

4. There have been several new events________ to the programme for the 2008 Beijing Olympic Games.

A.add B.to add C.adding D.added

提示：add为及物动词，add sth.to sth.本题应为add several new events to the program.因此add与new events之间为动宾关系，故用过去分词作后置定语。

答案：D

5. ________with so much trouble,we failed to complete the task on time.

A.Faced B.Face C.Facing D.To Face

提示：face with常用被动语态，表"使面对（问题、不愉快局面等）使面临"。如You are faced with a choice.你面临抉择。

答案：A