Walking in the morning _______ your health.A. are good forB. is good forC. is good at
When I got there, they the old people clean the house.A、helped B、are helping C、were helping
— has Jack been studying English?—Since he was seven years old.A、How long B、How often C、When
The little girl has to spend two hours the violin every day.A、to practice playing B、practicing playingC、to practice to play
We should read English for thirty minutes every day.A、at least B、at last C、at first
My father was watching TV the earthquake happened.A、as soon as B、while C、when