题目

research weigh include hide success 【1】An adult elephant___________ about 5,000kilos.【2】The young man is interested in medical______________【3】He wants to be a ____________writer like Mo Yan.【4】Mike went to the zoo and saw some animals, __________ pandas and wolves.【5】The dog __________itself behind the door. I couldn’t see it. 答案：【答案】【1】weighs【2】research【3】successful【4】including【5】hid【解析】【1】句意：一只成年大象的体重重约5000千克。根据语境，此处缺谓语，应填动词；根据所给词汇和句意，应该称重，用weigh；因“An adult elephant”是单数，且为一般现在时，故填weighs。【2】句意：这个年轻人对医学研究很感兴趣。若sin(π2+α)=13，则cos2α的值为（　　）A．-23B．-13C．13D．23