When he suddenly ________ up the subject of genetic engineering, there was an embarrassedsilence.
A、tookB
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Since William had been seriously ill for several months, his parents were worried about________ to return to school full-time.
Seniormembersofthestaffcompetedeagerly________thepositionofsalesmanagerinthecompany.
EachyearintheUnitedStates,manyblackteenagers_______ofschool,eitherbecausetheycannotkeepuportheyhavetoworktosupporttheirfamily.
________ the concert had begun did we realize what a splendid show it was going to be.
Sorry sir, we don't have wine or beer. We are only licensed to sell _______ drinks.
