问题补充：
It is a pleasure for me to write this letter to tell how much1.
I enjoyed my stay in your whole family last week. This was my2.
first visit to a English family. At first, I was worried about my3.
poor English. And when I saw your wife and children waiting for 4.
me with warm smile of welcome on their faces. I immediately knew 5.
that everything would be all right. There are many more happy 6.
memories of the week that I will keep with me forever. I particularly 7.
enjoyed driving through the countryside with you and saw the 8.
changing colors of the leaves on the trees. I also like the 9.
fishing trip. It was such much fun. 10. 在tell后加上you。
答案：
(答案→)在tell后加上you。
解析：
1. 此题考查词汇用法。tell需要跟两个宾语，即指人的间接宾语和指物的直接宾语，结构才算完整，故应在tell后加上you。
2. 此题考查介词用法。stay in some place，stay with sb.，注意句中的family指的是“家，家人”，不是指“住宅”意义上的“家”，故应将in改为with。
3. 此题考查冠词用法。在以元音开头的前需用不定冠词an，故应将a改为an。
4. 此题考查语句连贯。前后句之间的转折关系，故将And改为表示转折意义的But(或Yet)。
5. 此题考查名词单复数。smile为可数名词，故应将smile改为复数形式smiles。
6. 此题考查形容词用法。应去掉more，因为此处及上下文中不存在比较前提。
7. 此行无错。
8. 此题考查并列情况。将saw改为seeing，使其与driving并列，共同作enjoyed的宾语。
9. 此题考查时态用法。将like改为liked，使其与上下文的动词时间和形式保持一致。
10. 此题考查词汇用法。much前用so表示程度，故应将such改为so1. 此题考查名词用法。boy是可数名词，第一次提及，需要用不定冠词。故在boy前加a。
