until
till
as
when
第1题：
As water gets colder, its temperature drops lower and lower, until it begins to freeze.
第2题：
Compared to a constant pitch propeller, a controllable pitch propeller
A.more efficiently uses available engine power
B.operates at a lower efficiency at a fixed speed
C.produces the same torque at lower engine power
D.develops its rated power at a lower speed
第3题：
Why did they lower their heads in shame according to the passage？
A. They did not dare to answer.
B. They had mistaken the relationship of the mice.
C. They regretted driving a poor blind mouse away.
D. They did not express themselves much better.
第4题：
Lower the anchor until it is clear of （）（锚链筒）.
第5题：
Which of the following actions are stated in the correct order prior to loading or discharging cargo on a Ro-Ro vessel?
A.Lower the stern ramp，raise/open the stern door，turn on ventilation for cargo holds
B.Turn on ventilation for cargo holds，raise/open the stern door，lower the stern ramp
C.Turn on ventilation for cargo holds，lower the stern ramp，raise/open the stern door
D.Raise/open the stern door，lower the stern ramp，turn on ventilation for cargo holds
第6题：
A.Mail-Order Houses
B.Door-To-Door Sellers
C.Specialty Stores
D.General Stores
第7题：
I wish to inform you that as a result of negligence on the part of the lighter Susan when shifting at 0910 hrs this morning，the lower platform of the gangway was ______.
A.break
B.broke
C.breaked
D.broken
第8题：
此题为判断题(对，错)。
第9题：
Most covered lifeboats will right themselves after capsizing if the ______.
A.lower ballast tanks are filled with water
B.sea anchor is deployed to windward
C.fuel tanks are not less than half full
D.passengers are strapped to their seats
第10题：
Loss and damage ration for motor are lower than any other modes. Is it correct?（）