A 19-year-old teenager from Guangdong nicknamed Niko demanded an apology from Youku, which he believed violated their copyrights as it used his team's photos without ______.
It was in the small house ___ was built with stones by his father ___he spent his childhood .
If better use is ____ your spare time , you will make greater progress.
— Did you call on any of your old friends when you returned to your hometown ? —______ of them . They were all very busy .
It took seven years __________ they finally got married.
The students asked me ____________ going to be held.