A：Why__didn't_(do not)John_go__(go)to work today?
B:Because he__broke_(break)his arm yesterday.A :I_am__(be)sorry to hear that.What_happened__(happen)?B:He (fall)_fell__off the stairs on the way to the MTR.A:John usually__drives_(drive) to work.Why did not he_take__(take)his car this morning?B:He_heard__(hear)on the radio that there was a traffic jam so he_took__(take)the MTR.