It is necessary for us （） after having served for a certain period.

[单选题]It was very [thoughtful]of you to make all the necessary arrangements for u

[问答题]()I think the picture shows us how fruits is necessary tolife.

[问答题]I think the picture shows us how fruit is necessary to life.

[问答题]I think the picture shows us how fruit is necessary to life.

[单选题]We should be ableto do the job for you quickly, _____you give us all the ne

[单选题]David has tried 3 times to repair the clock. He will try __________time aft

[单选题]—It’s no use having ideas only.—Don’t worry. Peter can show you to turn an idea into an act.A． how B. who C. what D. where

[单选题]After the order “（）” is given, the air system is shut down, the turning gear put in.A . Finished with EngineB . Stop the EngineC . Stand-by EngineD . Slow-down Engine

[单选题]A．fter receiving the stores, you should sign on the ____.A．engine logbookB．delivery docketC．store listD．maintenance book

[单选题]A．fter the teacher’s words，all the students in the class _________.A． 1ooked very seriousB． thought they would be richC． began to think about their designsD． began to play games