--Why does the lake smell terrible?
---Because large quantities of water ______.
| A．have polluted | B．is being polluted |
| C．has been polluted | D．have been polluted |
Both of these roads can lead you to the History Museum. You may take ____.
| A．neither | B．either | C．both | D．any |
–Who has broken the window in my room?
--Who else ___ it but your naughty son!
| A．could do | B．could have done | C．might do | D．must have done |
______ , I believe, and you will find Tom is very outgoing.
| A．Having a talk with the student | B．One talk with the student |
| C．Given a talk with the student | D．If you have a talk with the student |
Nancy enjoyed herself so much ___ she visited her friends in Sydney last year.
| A．that | B．since | C．when | D．where |
–Can we borrow books form the library when it is completed?
--Of course. It is ____ to every citizen only if you get a special card.
| A．acceptable | B．accessible | C．reasonable | D．available |