—Why ______ she like history? —Because ________ interesting.
_____you do, don’t miss this exhibition, for it’s so hard for me to get the tickets.
This morning I had hardly got to my school when it_____ to rain.
Stephen Hawking can’t walk or even speak,_____he has become very successful.
_____of the two story books are very interesting, so I can’t decide which one to choose.
Mary is tired of learning because she is_____ to do better than she can, both at school and at home.