Therearesomanypeopleintheshop.Youmust________yourthings.
country_________ (复数)
Ithinkthe______(four)lessonisthemostdifficultinthisbook.
Ihavetwogoodpenfriends.OneisanAmerican,______isinEngland.
She _____(like) to play the flute.
()______ismyumbrella?It'soverthere.