David didn’t give up ______ he had failed in the experiment four times.
—Didn’t you hear the rain last night? — . I didn’t wake up until this morning.
—Excuse me, is it from Yizheng to Yangzhou?—Oh. It’s about 30 minutes’ drive.
—What were you doing when I called you at 8 p.m. yesterday? —I the piano at that time.
—Could you help me work out the maths problem, Mrs Zhao? — . What is it?
—Never the lions and tigers. They’re too dangerous. —Oh, I see. Thank you.