Others argue that since the earth has endured a long string of ice ages in the last two millionto three million years, any warming is ________ to be temporary.
B
暂无解析
Wemust______thattheexperimentiscontrolledasrigidlyaspossible.
Ababymightshowfearofanunfamiliaradult,_______heislikelytosmileandreachouttoanotherinfant.
It's more ________ to buy a season ticket if you travel every day.
________ from the occasional late night party, our neighbors are very quiet.
________, John has been to several foreign countries.