求高手解答现在完成时练习22.用since和for填空1) ______ two years 2) _______ two years ago 3) _______ last month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9)______we were children 1

求高手解答现在完成时练习22.用since和for填空1) ______ two years 2) _______ two years ago 3) _______ last month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9)______we were children 1 求高手解答现在完成时练习2.用since和for填空1) ______ two years 2) _______ two years ago 3) _______ last month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9)______we were children 10 现在完成时练习! 在三角形ABC中,2sinAcosB=sinC,那么三角形ABC一定是什么三角形跪求高手解答 地理练习.求高手 英语练习求解答 因式分解,求高手解答! 小学语文求高手解答 英语求高手解答 小学英语,求高手解答 求高手解答 求高手解答,谢谢. 求高手解答!线性代数! 求高手解答,具体步骤 求化学高手解答 求地理高手解答 英语现在完成时时态问题The subjects I have learned （） Chinese, Maths, English, Physics, Chemistry and Computer Science求高手解答,括号里应该用are还是were,本人初中生. 请高手帮解答一下 在三角形ABC中,B（-3,0） C(3,0) ,sinC+sinB=2sinA,求A点的轨迹