When did the Shanghai Expo open —_______May 1st, 2010. A．In

What can I do for you,sir? —-I”d like to see the manager ________of sales department.

It _____we had stayed together for a couple of weeks ______ I found we had a lot in common. [ ]

Jack has been working hard and _____ is no doubt that he will do a good job in the entrance exam

rus Ebola is reported ______ over 3,000 lives in 5 countries of West Africa by now.