When Madam Curie did the science experiment again, she was more careful ________ she had made a mistake.
| A．what | B．when | C．which | D．where |
I regret ______ that I’m too busy ______ in the talk.
| A．to say, to participate | B．saying, participating |
| C．to say, participating | D．saying, to participate |
----- Look, Dad! A bear is now with me!
----- Nothing will happen _______you keep lying still.
| A．as long as | B．as far as | C．unless | D．until |
All the Harry Potter books by Joanne Rowling, a poor single mother _____ in Edinburgh, _____ all over the world.
| A．lives; are well sold | B．lives; sell well | C．living; sell well | D．living; are well sold |
— You don't look well. Are you ill?
— No, the exam is coming and I _____ reading until midnight.
| A．kept up | B．got up | C．stayed up | D．woke up |
Your mother will be ____ until she hears you are safe.
| A．upset | B．nervous | C．anxious | D．doubtful |