Smiles around the world _____ be false, ______ other feelings like anger, fear or worry.
A.must; hide | B.must; hiding | C.can; hide | D.can; hiding |
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Smiles around the world _____ be false, ______ other feelings like anger, fear or worry.
A.must; hide | B.must; hiding | C.can; hide | D.can; hiding |