John often goes to school _____.
I can't find my pen. Could you help____________ find it?
-TV says there will be a storm tomorrow.-- ________I planned to go climbing with my classmates.
I still remember the college and the teachers ________ I visited in London years ago.
The people in Ya'an have met lots of difficulties, but they haven't ________ hope.
I'm surprised to hear from her. ________, we last met ten years ago.