--- Did you have a sound sleep last night?--- Yes, never slept ________.
--- The weather is very good. Let’s go to the seaside.--- ___________. Why not?
I heard that a great fire _________ when I was out in Tianjin last night.
—Why didn’t you try your best to get on the subway (地铁)? —I tried to, but it started moving _______ I could get on it.
I really enjoyed his speech, ________ there were some parts I didn’t quite understand.
---Excuse me, Mum. When can we have dinner? ---Not until it ___________ in half an hour.