-Can you show me _______ to use this kind of camera?-Sorry, I don't know, _______.
Whenever you meet with difficulties, you can ask the policeman ____help.
Samaranch, who is old friend of Chinese people, died on April 21, 2010.
Julia is very clever.In fact,I doubt whether anyone in the class has_______ IQ.
—Could you tell me_________?—He is in the library.
—Why don’t we take a little break? —Didn’t we just have_________?