They talked and ______ happily.
A. laugh
B. laughs
C. laughed
D. laughing
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It was ______ "living a low-carbon life".
A. to
B. about
C. with
D. for
Can I___a suggestion?
A. make
B. ignore
C. reject
D. welcome
plastic bags的含义是______。
A. 包装袋
B. 书包
C. 塑料制品
D. 塑料袋
Did you ______ the lecture in the library yesterday afternoon?
A. go
B. have
C. attend
D. buy