1 . Before getting into the car, I thought I had learned the instructor’s orders, ________ once I started the car, my mind went blank.

A．so

B．and

C．for

D．yet

2 . His children ______ his wife ______ invited to the party.

A．and, was

B．as well, were

C．as well as, was

D．as well as, were

3 . All the guest at the party were dancing and singing happily __________ the electricity was cut off.

A．until

B．while

C．when

D．because