Lots of rescue workers were working around the clock, _______ supplies to Yushu, Qinghai Province after the earthquake．
| A．sending | B．to send | C．having sent | D．to have sent |
The couple are spending their holiday on __is described as one of the most beautiful islands .
| A．that | B．what | C．which | D．where |
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．that | B．when | C．what | D．how |
A plan has been put forward __ more graduates should go to work in the country
| A．when | B．that | C．whether | D．how |
After three hours’ climbing , they reached they thought was the place they’d been dreaming of .
| A．what | B．which | C．where | D．that |