Youngerchildrenarecurious________howthingswork，andmanyofthemwanttotakeaparteverythingwithintheirreach.
Amanflowntoatimezonedifferentby10hourswill________eightdaystoreadjusthispalmsweat.
WhenyouwereinLondon,didyouvisit________________Tower,too?
Acompoundisthecombinationofonlytwowords.
WithanappropriaterelativepronounMybrotherspeaksEnglishfluently,________Idon’t.
