Ababymightshowfearofanunfamiliaradult,_______heislikelytosmileandreachouttoanotherinfant.
A、ifEach year in the United States, many black teenagers _______ of school, either because they cannot keep up or they have to work to support their family.
It's more ________ to buy a season ticket if you travel every day.
Othersarguethatsincetheearthhasenduredalongstringoficeagesinthelasttwomilliontothreemillionyears,anywarmingis________tobetemporary.
Onlya(n)________fewwereinvitedtothedancingparty.
To study a foreign language, __________.
