The old man __________ in Tibet for two years as avolunteer teacher；it is an experience he oftenmentions

________ make another try , Ishall do everything possible to help you .

He never ____learning English .That was why he was successful at last.

__ it to clear up tomorrow, the tourists would climb to the top of the mountain to see the sun __.

When I swim in the river, I I’m a fish.