The mobile phone has changed people’s life a lot ________ it was invented.
Miss Lin ______ a lot of work for the poor area for about 10 years.
It’s time for class. Mr.King asked all the children______down quietly.
—Mike, where is Miss Li?—She ______ a speech to the first-year students now.
— Jenny, I need some milk?—Ok, Mum.______do you need?
There ______ still some apples in the fridge now.