No chicken or duck ______ in the supermarket since the first case of H7N9 was reported dead.
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.
Rather than _________ at home, he always prefers ________ out to play.