We liked the oil painting better____________ we looked at it.
| A．as | B．while | C．the | D．the more |
A person , when_________，can often do what is normally beyond his ability.
| A．challenged | B．challenges |
| C．challenging | D．to challenge |
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 |