Nobody but doctors or nurses and those ____ by Dr Hu ____ to enter the patient’s room.
We were swimming in the lake _______ the storm started.
She was walking down the road _______ she heard someone shouting for help.
The fire went on for quite some time _______ it was brought under control.
He made a mistake, but then he corrected the situation _______ it got worse.
Someone called me up in the middle of the night, but they hung up ________ I could answer the phone.