Do you have a pen?I want a letter.A. to writeB. to workC. writingD. working

问题补充：

Do you have a pen?I want a letter.

A. to write

B. to work

C. writing

D. working

答案：

(答案→)A. to write

B. to work

C. writing

D. working

解析：句意：你有钢笔吗？我想要写一封信。这里是短语want to do sth想要做某事。writer a letter写信，故选A。