You’d better do it ________ your motherdid

are you doing this Saturday— I’m not sure, but I go to theRolling Stones concert

ok didn’t come back at the usual time lastnight ______, he met some friends and stayed out until midnight

He had no sooner finished his speech________ the students started cheering.(2011·辽宁)

The twins may look the same _____ each other, but theyare different ______ many ways.