SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
A、hewantedWhenhesuddenly________upthesubjectofgeneticengineering,therewasanembarrassedsilence.
Sixtypercentoftelevisionviewerschosehimastheir_______actor.
Theaddressbook________theemailaddressesofyourfriendsorgroupsofcolleagues.
Aftersomanydayswithoutrain,thegroundquickly________thelittlerainthatfelllastnight.
Whenworkersareorganizedintradeunions,employersfindithardtolaythem________.
