—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?
—______ my students have a try?
| A．May | B．Must | C．Will | D．Shall |
The train_____at the present speed until it reaches Chicago at eleven o’clock tonight.
| A．has gone | B．will be going | C．went | D．goes |
---When will the expert come and give the lecture on economic development?
---Not until our program_______.
| A．is approving | B．is to approve |
| C．has been approved | D．will be approved |
I______toward the door to go outside when suddenly Jim opened it.
| A．was walking | B．walked | C．hadwalked | D．walk |
---When choosing furniture, you focus on function while I think more about the design.
---That’s_____we differ.
| A．how | B．what | C．which | D．where |
---Thank you for inviting us.Tell your wife that she gave us a perfect party.
---I______. See you later.
| A．must | B．should | C．will | D．can |