（用所给词的适当形式填空） The exhibition _______ (hold) next week．

（用所给词的适当形式填空） The machine is designed _____ (help) us do the housework．

（用所给词的适当形式填空）She ______ (call) me as soon as she comes back．

（翻译句子）我不知道他们在谈论什么。

（用所给动词的正确形式填空)  Did you remember how many words you ______ (learn) since three years ago?

（用所给动词的正确形式填空) The mother told her little son that there ______ (be) 365 days in a year．

（用所给动词的正确形式填空) He told the police he _______ (play) computer games at 9：OO a．m．

（用所给动词的正确形式填空) We don't know who ______ (teach) us English next term．

（用所给动词的正确形式填空) He knew that he ______ (be) wrong．

(将下列句子改为含有宾语从句的主从复合句) What has he said? Do you know?

　　Do you know _____ he ______ said?