Ato do
Bdo
Cthat I did
Ddoing
第1题
Athat you just talked
Bwhom you just talked to
Cwhich you just talked to
Dwho you just talked
第3题
Atoday of designers
Btoday’s of designers
Ctoday’s designers
Dtoday designers
第4题
APeter and Helen’s
BPeter and Helen
CPeter and Helens
DPeter’s and Helen’s
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