When did VN－Index begin its declining trend？A．Three years ago.B．In early 2007.C．Towards th

Teacher：When wiH the lecture begin？Student：It will begin at half past eight． Teacher：_____

When did the crisis begin？A．Over seven days ago.B．Over three days ago.C．On Wednesday.D．On

Generally it isnt harmful to our ears, when sounds are up to______.A．140 decibelsB．100 dec

When did the pianist begin to play his own composition？A．At the age of 5.B．At the age of 1

When did residents in Guangdong begin to protect their culture and dialect？A．Since last ye

According to the news item, when did the Japan Airlines business begin to decline？A．Before