Complete these sentences with ONE suitable preposition. (5pts)
1. To be able to speak English more fluently, learners should spend more time watching programs______ English speaking skill.
2.. Those kind-hearted students came to help the poor children in our remote village and left them _____ lots of love and encouragement
3. The car broke down on our way, but we were lucky enough to arrive __________ Cham Temple not too late in the afternoon.
4. Scientists and educational researchers should do more research __________ how to encourage our students love reading.
5. UNESCO stands _______ United Nations Educational, Scientific and Cultural Organization.