Sustainable development is long-term ________which focuses on the environment and ________ natural resources．
| A．plan; preserve | B．plan; preserving |
| C．planning; preserving | D．planning ;preserve |
It is clear that a computer works ______ faster than an abacus .
| A．a lot | B．a lot of | C．little | D．very |
Tommy is _______ captain of the class team at school and he is also _____ member of _____ Senor High team．
| A．/ ; a ; the | B．the ; the ; the | C．the ; a ; the | D．/ ; / ; the |
______ students up to 2, 000 , the school has built another laboratory．
| A．As | B．For | C．with | D．Since |
Every possible means _______ to prevent the crash , but the computer doesn’t still work．
| A．is used | B．are used |
| C．has been used | D．have been used |
Have you made up your mind ________ abroad? I advise you to consider it carefully.
| A．study | B．to study | C．studying | D．studied |