If you happen to see the process of cooking in a restaurant, you might see the cook using rubbish oil, which is a common _____ in China nowadays.
The picture ______ on the wall is painted by my nephew.
The result of the experiment was very good, ______ we hadn’t expected.
Please tell me the way you thought of ______ the garden.
Passengers are required to _____ seated until the plane comes to a complete stop.
I know there is a coin in your left hand, but what’s in your _______ hand?