30.---- Do you think it's a good idea to make friends with your students?---- _____ , I do. I think it's a great idea.
After leaving college, Mike was employed in an international company and _____ there ever since.
The weather in London is so changeable that people always take their umbrellas with them _____ rain.
There is no _____ that taking regular physical exercise is good for your heart.
Without ____electricity, how can we search for information on ____Internet?
—Shall we go out for dinner or cook at home?—___________. It’s up to you.