赞题库-背景图
单项选择题

A．Surprise visits are acceptable among close friends.
B．Surprise visits are not welcome even among close friends.
C．People expect even their close friends to call them before their visits.
D．Dropping in on your friends is considered good manners.
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热门试题

单项选择题A．Taking a short break.B．Helping each other with the assignment.C．Gathering more information from other students they know.D．Asking a professor for help.

A．Taking a short break.
B．Helping each other with the assignment.
C．Gathering more information from other students they know.
D．Asking a professor for help.

单项选择题A．About 55%.B．About 15%.C．About 50%.D．About 5%.

A．About 55%.
B．About 15%.
C．About 50%.
D．About 5%.