26．______ I'm willing to help, I do not have much time available．
| A．While | B．When | C．Once | D．Since |
She got stuck in a terrible traffic jam on the highway to Shanghai，or she
dinner with her family now．
| A．will be having | B．would be having | C．is having | D．was having |
The magician picked some persons from the audience _____ and asked them to help him with the performance．
| A．by accident | B．in vain | C．at random | D．on average |
Let's find a placewe can wait out the snowstorm．
| A．where | B．which | C．what | D．when |
Barack Obama delivered a speech to 500 local youths during his visit to China，many ofwere from Fudan University and Tongji University．
| A．them | B．whom | C．which | D．those |
Chinadaily. com. cn is the largest English portal site in China，news，business information and learning materials．
| A．to provide | B．provide | C．provided | D．providing |