--When ___________ your brother ___________ his hometown?---He ____________ for nearly three years.
John didn’t know ____ the medicine.A. what to takeB. how to takeC. where to eat
This is the question______ we are talking about now.A. which B. who C. what
There is _____800-meter-long road behind____ hospital.A. an, an B. an, the C. a, the
He improved his English a lot listening to the radio.
The students hurried to the classroom the bell rang.