I can’t quite remember ________ I was taken to Beijing.
(2) We all regarded the poor old man ____sympathy.
We’ve talked a lot _______ films. How _____ television now?
In those days, we had no phones, so we have to keep in touch _____ writing often.
“When did you leave the farm?” “____ the end of last year.”
“How long will you work on the farm?” “____ the end of next year.”