–I called you yesterday afternoon, but you were not at home.--Sorry, I _________ some shopping with my mother then .
If more trees ________ , our city will be more and more beautiful.
This brush pen is made _______ bamboo.
Although he lives _______ , he never feels ________ .
--- _______ are they talking about? --- Our English teacher. A. Whom B. What C. whose D. When
Tomorrow is Father’s Day. I don’t know ________ .