—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 |
Computers and mobile phones, though they are indeed making our life ____ and more ____, have reduced the need for face-to-face communications.
| A．easily; efficient | B．easier; efficient | C．easy; efficiently | D．easily; efficiently |
The woman ____there under the tree, ____ in a blue shirt, is our headmaster.
| A．sitting; wearing | B．sitting; dressed | C．seating; dressed | D．seated; dressing |
The new technology, if____ to farming, will help increase the grain output.
| A．applying | B．to apply | C．applied | D．having applied |
More and more high-rise buildings have been built in big cities____ space.
| A．in search of | B．in place of | C．for lack of | D．for fear of |
Nowadays, more and more people like to hunt for what they want at www.taobao.com and have them ____ by the express company.
| A．delivering | B．delivered | C．to deliver | D．deliver |