—Did you enjoy your stay in Beijing,Mrs Black?—Yes.I’ve had________wonderful time.
It_______me15minutestogettoschoolonmy bike.
------Whyareyouso________? -------Iamwatchingan_______basketballmatch.
The math problem is too difficult ,I can’t__________ .
Many old men prefer __________ in a peaceful countryside.
Mary likes learing English,______ she doesn’t like learning math at all.