A thousand million is a b______．(根据句意及首字母提示完成单词)

It is impolite to ask a woman's age because it's a s______．(根据句意及首字母提示完成单词)

Shenzhou Ⅵ is an u______ spacecraft，isn't it? (根据句意及首字母提示完成单词)

Have you heard from your aunt r______? (根据句意及首字母提示完成单词)

(句型转换) Mary isn't here．She went to Hainan yesterday． (改为同义句)

　　Mary _______ _______ to Hainan．

(句型转换) The spacecraft has already reached Mars．(改为否定句)

　　The spacecraft _______ _______ Mars _______．

(写出下列单词的过去式和过去分词) have

(写出下列单词的过去式和过去分词) make

(写出下列单词的过去式和过去分词) find

(写出下列单词的过去式和过去分词) send