1.他可能是一名宇航员.
I am not sure what he is,but I think he is an astronaut.
2.你能帮我一个忙/帮帮我吗?
Could you help me?Could you give me a hand?
3.穿过这个田野你便看到一坐房子.
There is a house in front of the field.
4.努力学习,否则你会落后的.
If you don't study hard,others will catch up with you.
5.突然,一辆汽车出现在拐角.
All of a sudden,round the corner appeared a car.
6.你能帮我们安排一下那个会议吗?
Can you make arrangement for the meeting for us?
7.为什么不加入我们呢?
Why don't you join us?
8.她是我们班上最好的(小)学生之一.
She is one of the best pupils in our class.
9.对于我来说,解决那个问题很困难.
That problem is so hard for me that I can't work it out.