The computer centre, ____ last year , is very popular among the students in this school.
A．open B．opening C．having opened D．opened
When the spaceship was , I could really feel the high gravity.
A．lifting off B．sending away C．lifting away D．giving a lift
He still remembers the days ______ he spent with your family.
A．when B．where C．that D．on which
The thieves ran away when the burglar alarm(防盗警报器) .
A．broke away B．came back C．went badly D．went off
The secretary worked late into the night, _____ a long speech for the president.
A．to prepare B．preparing C．prepared D．was preparing
The train was ______ to arrive at 11:30,but it was an hour late.
A．about B．likely C．certain D．supposed
