-Where's your father, Tom? -He__to Changsha.A. goes B. went C. has gone
Would you mind ___________ me how to start this online tour ?
Mr Wang isn’t here , I think he __________ Shanghai .
--- Lily is ill in hospital .---Really ? I _____ know she was ill .
The task is so hard fore . I don’t know _______________.
Good books help us ___________ a whole new world to me .