(2013·高考江西卷)He wrote a letter________he explained what had happened in the accident.

I still remember my happy childhood when my mother ________ take me to Disneyland at weekends.

expected house prices to fall, but _____ that’sexactly what happened

The twins are so much alike that no one can ________one from the other.

I failed the exam ________ I did my best. But I’ll try harder next time.