单项选择题

A．Some sea creatures developed backbones.
B．The first giant squid was captured.
C．Some sea creatures shed their shells.
D．Sea life became more intelligent.
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单项选择题
A．Singing loudly.B．Listening to music.C．Studying.D．Talking on the phone.
A．Singing loudly.
B．Listening to music.
C．Studying.
D．Talking on the phone.
单项选择题
A．He didn’t understand the lecture.B．He wants to borrow her notes next week.C．He needs help with a makeup exam,D．He was sick and unable to attend.
A．He didn’t understand the lecture.
B．He wants to borrow her notes next week.
C．He needs help with a makeup exam,
D．He was sick and unable to attend.
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