1．那天在車站,我碰巧遇到了我的一位老朋友。
I                        ____    an old friend of mine at the station that day.
2．他再也沒有見到救他的那個(gè)小伙子，也不知道他叫什么名字。
He_        saw the young man who saved him again,        what his name was.
3．昨天晚上離家時(shí)，他忘記鎖門了。
He                       _          the door when he left his home yesterday evening;．
4．這塊手表太貴，我買不起。
The watch is too expensive, I                       ____  buy it.
5．我打算用這舊電腦，不買新的。
I'm going to use the old computer,                      _        buying a new one.
6．他總是避免在熱鬧的街道上騎車。
He                               bike on busy streets.
7．他那時(shí)是在寫信，而不是在看報(bào)。
He was writing a letter                         reading the newspaper at that time.