25. ―Look! What a mistake! Why?
―Sorry, I _________ on it.
| A．don’t concentrate | B．hadn’t concentrated |
| C．haven’t been concentrating | D．wasn’t concentrating |
----Silly me ! I forgot what my luggage looks like.
----What do you think of _____ over there?
| A．the one | B．this | C．it | D．that |
______the website of www．google．com, and you will learn a lot about Obama’s first official visit to China．
| A．Searching | B．To search |
| C．Having searched | D．Search |
He’s ________ to fail the exam if he doesn’t do any revision.
| A．near | B．fit | C．bound | D．easy |
Many people believe we are suffering from environmental disaster _____we radically(彻底地) change the way we live.
| A．but | B．although | C．unless | D．so |
For us Senior Three students, believing that our hard work will______can strengthen our confidence.
| A．take off | B．pay off | C．keep off | D．get off |