Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
—I really don’t know whether I can be admitted to dream university in a month. —________. Everything is possible.
—Don’ t you agree with what he said at the meeting? —Yes, ________! It can’t be better.
A proper approach to ________ your learning efficiency is of great significance to every student.
—Why are you looking so worried? —I sent an email to my son in America last week, but no reply ________.
When the environmentally friendly cars came onto the market, many people were eager to buy them ________ the price.