Rainforests _______ and burned at such a speed that they will disappear from the earth in the near future.
The child asked his mother _______ go out to play tennis.
When changing lanes, a driver should use his turning signal to let other drivers know _______.
After dinner they talked about the persons and things _______ they still remembered.
She was so amused with the magician’s tricks that she ________ a smile.
— Do you know the West Lake in Hangzhou? — Yes, this is the third time that I ____ this beautiful city.