The doctor came at once in _____ to my call.A、replyB、answerC、hearingD、 listening

The shuttle exploded in the air suddenly and broke into ______ at once.A．diversityB．fragme

_________(53)A.in B.onC.at D.to

_________(53)A.in B.onC.at D.to

_________(53)A.in B.onC.at D.to

The doctors stand at the power center in health-care industry because__________.

When Lily came home at 5 p.m. yesterday her mother _____ dinner in the kitchen.A.