人妻精品99I日韩无码视频一区二区I欧美色图50pIwuyeripiI欧产日产国产swagI欧美 日韩 久久I99国产精品久久久久老师I成人AV电影网I艳妇乳肉豪妇荡乳AV无码福利I国产精品国产精品国产专区蜜臀AhI成人久久免费视频Iwww.91在线观看视频I国自产在线观看I色之综合网

1. She always rides the same kind of bike ____ her twin sister does.
A) that    B) which    C) as   D) what

2. ____, I ’d have done it myself.
A) If I knew it            C) Had I known it
B) If I had have known it      D) Should I known it

3. The sun’s appearing to rise in the east is ____ the revolution of the earth on its axis from west to east.
A) owe to   B) due to   C) as to   D) as for

                            4. It was because she was too inexperienced ____  she        didn’t know how to deal with the situation.
              A) so that   B) that   C) that is why   D) so