—I called you yesterday evening, but nobody answered.
—Oh, ______ at that time.
| A．I’m cooking | B．I cooked |
| C．I cook | D．I was cooking |
—Do you practice how to escape from dangers every term?
—Of course. Our school pays much attention to the ______ of safety.
| A．development | B．importance |
| C．advertisement | D．difference |
—Are these books yours, Mike?
—No, they aren’t. They belong to ______.
| A．him | B．his | C．hers | D．she |
—I think sixteen-year-olds should be allowed to drive.
—______. They aren’t serious enough at that age.
| A．I agree | B．I disagree |
| C．I think so | D．That’s right |
—Let’s visit the sick children in hospital and ______.
—OK, let’s go.
| A．put them up | B．set them up |
| C．fix them up | D．cheer them up |