11- Using renewable energy means we'll never ............... it
a- run out of b- run out c- use up d- capture
12- hold back water which is then used to turn turbines
d- hold down b- moves behind c- hold back a- leave behind
13. They are twins. They take ……………… each other
a. over b. up c. after d. away
14.I will try not to …………...too much of your time
a. take up b. make up c. give up d. show up
15- You can check the meanings of these words ……… your Active Study Dictionary
d- on c- of b- at a- in