Linda eats ________ rich food. She must change her diet.
Since June 1 2008,all the markets have_________free plastic bags.
---Have you seen Dr. Adams recently? ---No. He __________ Hong Kong for an important meeting. He’ll come back tomorrow.
-- Has your sister come back? --Yes, she has. She______ back two days ago.
There __________great changes in our hometown in the past fifteen years.
-----________did your uncle leave his home town ? ----He ___________for nearly twenty years.