Ithinkthe______(four)lessonisthemostdifficultinthisbook.
Yourfatherandyourmotherareyourp_____
()Whatabout__________?
()It's_____mynewcar.
Theseare______.Youcanbuyapairforyourmother.
Ihaveapenfriend，andwealwayssende_____toeachotherbycomputer
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