14. Over the long process of evolution, animals have developed their ______ senses, which makes it possible for them to _____ their environments.
| A．specially; conquer | B．unique; survive |
| C．uniquely; survive | D．special; exist |
In his speech, Premier Wen Jiabao points out that creativity is __it takes to keep a nation highly competitive .
| A．how | B．what | C．which | D．that |
The book is meant to ___needs it .
| A．who | B．whoever | C．whomever | D．whom |
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 |