(2013·濰坊市高三二模)Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.
A．mustB．should
C．canD．would
C
選C　句意：有時(shí)微笑可能是假的，目的是隱藏像憤怒、恐懼或焦慮那樣的情感。表示“有時(shí)會(huì)”用can。
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