The young lady stopped and looked around as if_____ whether she was being followed. A seeing B to have seen C having seen D to see
48. They were all tired, but _____ of them would stop to take a rest.
49. I don’t know whether small oranges are sweeter than big ______.
50. When they met, they stopped and said hello to_______.
51. After everyone took_______ place, the meeting began.
52. -Why don’t we take a little break? -Didn’t we just have _______?