假如你是学生会主席张凡，学校安排你给即将到你校任教的外籍教师Martin推荐一名学生助手。请根据以下要点给他写封推荐信。

要点如下：

1.欢迎Martin的到来；

2.推荐李华为学生助手（高二年级学生， 17岁）

3.介绍李华当助手的优势（电脑，沟通能力，热心助人，英语水平）

注意事项：

1. 词数不少于100.

2.开头和结尾已给出， 不计入总词数。

3.可以适当增加细节，以使行文连贯。

参考词汇：助手 assistant

Dear Martin,

_______________________________________________________________

Yours sincerely,

Zhang Fan

— Thanks for the lift. I do appreciate it.

— _____.

A．No problem        B．With pleasure      C．Not necessary      D．A piece of cake

Currently，many American women are still faced with the _____ of choosing between work and family commitments.

A．desperation        B．confusion          C．dilemma          D．concern

With economy developing at great speed, our city has _____ quite a few changes in recent years.

A．witnessed         B．accumulated       C．arisen            D．introduced

You have no chance of getting the position. I’m afraid you _____ your time if you apply for it.

A．waste            B．have wasted        C．have been wasting   D．will be wasting

It is difficult for children to change their eating habit later in life. _____，parents should encourage healthy eating from an early age.

A．Otherwise         B．Therefore         C．Besides           D．However

— Are these seats available?

— Sorry, sir. The seats _____.

A．have reserved      B．are reserved       C．reserved          D．are reserving

Helen has got _____ it takes to be a great tennis player. In other words, she has the potential to become world famous.

A．how              B．what             C．when             D．that

I just couldn't understand the former mayor _____ the money raised for children in poor areas.

A．taking            B．to take            C．being taken        D．to be taken

_____ the instructions very carefully when filling in the form.

A．Following          B．To follow          C．Follow            D．Followed