Robinson Crusoe couldn't see a ________ of hope that he would be saved by a passing ship.
句意：鲁滨孙看不到他会被驶过的船救下的一丝希望。a slice of一份；一片。span跨度；范围。gleam微光。grain粮食；颗粒。因此，本题的正确答案为A。