根据所给中文意思填空，补全下列各句
（1）他们作为交换生在新加坡学习英语已经一年了。
They have been learning English as ____ in Singapore____  a year.
（2）你喜欢和什么样的人交朋友？
What ____  of person do you like to make ____  with?
（3）我现在最想做的事情是睡觉。
Now all I ever ____  to do is ____ .
（4）你作导游多久了？
____  have you been a tour ____ ?
（5）我们每天花一个小时做作业。
It ____us an hour____  our____ .

    Many teachers believe that hands－on experience is the ____(good) way to learn. A group of students in the United States are putting that belief to the test. They ____ (success) designed and built a robot for discovering unexplored mines ____ the bottom of the sea. Students made the robot ____(answer) a challenge from the U．S. Department of Defense.

    The students recently tested the underwater vehicle ____(call) PerseusⅡin a 95－meter－long tank of water at the Stevens Institute of Technology.

    The robot costs about $15,000 to build. The students use a video game control to direct ____(it) movements in the tank. What's more, devices known as Japters ____ (able) the robot to go up, down and toward its target in the water. Video cameras on the robot send images back to a computer through a 13－meter－long cable. Perseus Ⅱ,____the students worked up to 20 hours a week to design and build, also has ____ set of lasers (激光), which are used to measure the size of an object.

    DeLorme supervised the project from ____(begin) to end. He says the specialized requirements of robots were demanding.

由此估计这种幼树在此条件下移植成活的概率约是____（精确到0.1）