He _____ to participate in the school debate, but on second thoughts, he gave up the idea.
. One more week, ______ we'll finish all the task completely.
. China will send its first Mars Rover, Yinghuo-1, into ______ space by ______Russian space rocket in October 2009.
. Mr. Smith owns ______ collection of coins than anyone else I have ever met.
. In order to improve my spoken English, I read ________ English _______.
. _______ in the room where Mr. Johnson lived _______ the exhibition was held?