13. I'm pressed for time and I am afraid I need someone to help us.
我时间紧迫，恐怕需要有人帮忙完成。
还能这样说：
I am in a hurry and need someone to give me a hand.
I an jammed for time and want someone to aid me.
应用解析：
press home 极力主张，坚持到底；
press into service 因急需而强迫征用人或物；
be presed for sth. 缺少某物；
time presses 时间紧迫；
press sth. to one 抱紧某物

14. I'm nearly finished.
我快完成了。
还能这样说：
I will finish it in a moment later.
I almost complete it.
应用解析：
near to sb.'s heart 使某人很感兴趣，为某人深切关注；
one's nearest and dearest 亲人；
or near offer 或略低于此价，可还价

15. Unfortunately, we've hit a snag.
不幸的是我们遇到了意想不到的困难。
还能这样说：
We are unlucky to meet an unexpected difficult.
Unfortunately, a problem beyond thought occurs to us.

16. We're right on target.
我们正按计划进行。
还能这样说：
Everything is going as planned.
We are scheduled.
应用解析：
target for an attack 众矢之的；
off target 不切题；
hit the target 完成指标；
track a target 追踪目标；
use sth. as a target 把……当做靶子

17. When can you have it finished by?
你们什么时候可以完成？
还能这样说：
What time can you finish it?
Can you tell me the time when you can accomplish it?
应用解析：
be in at the finish 在某事物的终结时在场；
fight to the finish 战至分出胜负；
finish with 用完，断交；
finish with sb. 不再为某人忙碌