Not for a moment ______ sightseeing while in Europe.
| A．has he stopped | B．he stops | C．did he stop | D．he did stop |
Mark needs to learn Chinese ______ his company is opening a branch in Beijing.
| A．unless | B．until | C．although | D．since |
They _________ have arrived at lunchtime but their flight was delayed.
| A．will | B．can |
| C．must | D．should |
The year 1949 ________ the birth of a new country—the People’s Republic of China.
| A．found | B．watched |
| C．noticed | D．saw |
He told us whether __________ a picnic was still under discussion.
| A．to have | B．having |
| C．have | D．had |
Rather than _________ at home, he always prefers ________ out to play.
| A．stay; go | B．staying; go |
| C．stay; to go | D．to stay; going |