I’m worried about tomorrow’s math exam. — ______ . I’m sure you will make it.

________ astronauts cannot go to a baseball game or a movie in orbit , there are many familiar activities that they can still enjoy

The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?—________ my students have a try?

Young children should be ________ to be honest and equal.

Did you have any trouble in getting here ?— No I would have telephoned you [ ]