________you’ve experienced it，you can’t understand how I felt.
A．Once B．Because
C．Unless D．While
I had no idea of the exact address of Xinhua High School ________I was outside its front gate.
A．when B．after
C．until D．because
John plays basketball well，________ his favorite sport is badminton.
A．so B．or C．yet D．for
________tomorrow，our ship will set sail for Macao.
A．However the weather is like
B．However is the weather like
C．Whatever is the weather like
D．Whatever the weather is like
If you are traveling ________ the customs are really foreign to your own，please do as the Romans do.
A．in which B．what
C．when D．where
Find ways to praise your children often，________ you’ll find they will open their hearts to you.
A．till B．or C．and D．but
