海船船员考试
单选题It is necessary for us （） after having served for a certain period.A to change the lube oilB have the lube oil purifiedC have the lube oil burntD to analyze the lube oil
题目
to change the lube oil
have the lube oil purified
have the lube oil burnt
to analyze the lube oil
相似问题和答案
第1题：
It is certain that men will never stop _____ new energy sources to power their growing industry.
A. finding
B. to find
C. having found
D. found
第2题：
When ( ) the airport, she waved again and again to us.
A、leaving
B、left
C、having left
D、having been leaving
解析：she 和leave是主动关系，用现在分词
第3题：
此题为判断题(对，错)。
第4题：
In the last paragraph，the author mainly intends to
A．list the necessary changes we ought to make
B．advise US to make any necessary changes
C．explain what changes can bring
D． explain the process of making changes
概括文章最后一段可知，作者建议我们，改变无所谓大小，只要必要就需要改变。A项是对文章的片面理解；C项是文章的细节，不是段落的主旨。
第5题：
After having seen the()and samples, Jenny makes the specific inquiry.
A、 category
B、 catalogue
C、 calculation
第6题：
Fear of being unpopular and having no friends can push customers to buy certain products.()
第7题：
第8题：
A.Having drank
B.Drinking
C.After drank
D.Having drunk
第9题：
If you are having your hair () and also having us () sculptured nails, the cost for your nail application will be $25.00 instead of $30.00.
A、done,applied
B、done,apply
C、did,apply
D、done,applying
第10题：
B.It was reading
C.It was after reading
D.Having read