1.(when) 2.(how) 3.(where) 4.(which) 1.(took) 2.(speaking) 3.(calling) 4.(to wash) 5.(flying) 1. I saw (not only children but adults laughing)out loud. 2. (The year when Mary came to Japan) is 2007. 3. Do you know (why there are so many food surpluses) in Japan? 1. I have (no knowledge about those who live below the relative poverty line). 2. He worked hard (so that the homeless people could get off the streets). 3. At least hundreds of millions of people (live in lands where there is no safe and clean water)