HW:
https://www.cambridgeenglish.org/test-your-english/
https://www.businessenglishsite.com/business-english-grammar-tests.html
(verb tenses)
Embedded questions
https://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/410-embedded-questions.htm
https://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/410-embedded-questions1.htm
https://www.engvid.com/conversational-english-embedded-questions/
Recommended reading:
https://www.bbc.co.uk/worldservice/learningenglish/