—Who went to the park with you yesterday?—Li Lei _____.
We believe scientists will ______ a way to solve the problem of air pollution.
The window was broken. Try to ______ who has broken it.
—Did you take ______ one-day trip to the West Hill last Sunday? —Yes. It was fantastic! It’s _______ most delightful trip I’ve ever had.
—Can you tell me ______? —He is outgoing and friendly.
—Why do you like the panda best in this zoo? —Because it’s the only animal ______ comes from China.