—Which one can I take? —-You can take__________ of them; I'll keep none.
——Why are you late for the meeting? —— I got caught in the heavy rain, or I _______ earlier.
The 3G cell-phone must be of great use to ______ wants to get the information through the Internet quickly.
——How do you like the set of popular science books? ——Wonderful! It _____ many problems we are interested in exploring.
Was it in the train “ Harmony”, ______ is China’s first high-speed one, that John met with his foreign friend?
Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.