He’d like to sleep with the window ＿＿＿＿ at night. 

Nowadays, a lot of children have less time to play and communicate with their peer due to extra studies. ________, it is difficult to develop their character and social skills. 

The houses in this village are______built of bricks.

A firm from New Zealand has revealed a set of robotic legs which they claim will soon allow ________ wheelchair-bound people to walk again.

Young people spend most of their time _________, for they don’t want to stay at home all day.