I must ask my father to give up . A. smoke B. to smoke C. smokes D. smoking
We were going out for a Christmas meal together ______ the accident happened. A. unless B. until C. while D. when
指出图中几何体截面的形状（ ） A． B． C． D．
1943年2月，罗斯福在致斯大林的一封贺信中写道：“(苏联人民取得这一战役的胜 利)制止了侵略浪潮，成了盟军反侵略战争的转折点。”这一“转折点”
25 ℃和101 kPa时，乙烷、乙炔和丙烯组成的混合烃32 mL与过量氧气混合并完全燃烧，除去水蒸气，恢复到原来的温度和压强，气体总体积缩小了72 mL，原
1．依次填入下列横线处的成语，最恰当的一组是 ①黄山旅游景区游客满意度名列全国第二，当记者问到原因时，负责人说：“主要是对游客的意见
The doctor told Jack to ______ on his drinking if he wanted to keep healthy. A. watch out B. set off C. cut downD. break up
---Do you know ______? ---Sorry, but if he _____ back, I ____ you know as soon as possible. A. when will he be back, comes, will let B. when he will be back, will come, will let
