It’s already 10 o’clock. I wonder how it ____that she was 3 hours late on such a short trip.
_______ my mother ________ my sister watches TV plays these days.
The nurse doesn't feel well today, _________ she still works very hard.
Tom has been in the factory _________he left school.
He had _________ much work to do that he couldn't go out.
________the new computer, travellers at the offices of CAAC can now buy their air tickets much faster.