题目

当前，人类面临的共同问题是（    ） A.水土流失、土地沙化问题            B.流行病的防治问题    C.资源短缺问题                      D.人口、资源、环境问题 答案：D从方框中选择合适的词组并用其正确形式填入下面的句子中，使句子的意思完整。 take part in play a role compete for admit as as well as relate to admit to every other year one after another compete with 　 　 The girl who ________ the English contest an hour ago is my sister.