The electronic red-packet has been so ______ that AliPay and Tencent Wechat compete against each other openly and secretly since the beginning of this year.
_____ the pain was bad, _____he did not complain.
_____we fail , we _____trying.
_____it was late , she went on working.
He started early so that he_____there in time.
_____clearly so that your teacher_____you correctly.