Mary had promised to give me a ticket for tomorrow.She failed, ____.
.I can_____be a teacher. I’m not a very patient person.
. The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.
. As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.
. It seems that living green is______easy and affordable. A small step masks a big difference.
-- Do you think it's a good idea to make friends with your students? --______, I do. I think it's a great idea.