We really shouldn’t use plastic bags any more when shopping.—_____ It’s important to protect our environment.

Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to his bedroom.

don’t know what to_________at the university. I can’t make any forecasts about my future.

much advice I gave her, she did what she wanted to do.

we had _______ Disneyland in Shanghai on May Day!