—Oh, I failed again—Don’t lose heart. One more effort, ________ you will succeed.
The couple are spending their holiday on __is described as one of the most beautiful islands .
See the flag on top of the building ? That was ___ we did this morning . A when B. which C. where D. what
It is pretty well understood __________controls the flow of carbon dioxide in and out the atmosphere today.
A plan has been put forward __ more graduates should go to work in the country
After three hours’ climbing , they reached they thought was the place they’d been dreaming of .