.Allow children the space to voice their opinions,____ they are different from your own.
A person , when_________,can often do what is normally beyond his ability.
Mark needs to learn Chinese ______ his company is opening a branch in Beijing.
They _________ have arrived at lunchtime but their flight was delayed.
The year 1949 ________ the birth of a new country—the People’s Republic of China.
He told us whether __________ a picnic was still under discussion.