Would it be ______ for you to pick me up at four o’clock and take me to the airport ?
|   A.free  |    B.vacant  |    C.handy  |    D.convenient  |  
Would it be ______ for you to pick me up at four o’clock and take me to the airport ?
|   A.free  |    B.vacant  |    C.handy  |    D.convenient  |  
D