第3题
______relatively costly, the engine is highly efficient and needs servicing infrequently.
A.Even
B.It is
C.Even though
D.There is
第4题
A.executive
B.extensive
C.effective
D.efficient
第5题
A.lovely
B.hard
C.efficient
D.respective
第6题
______way is more efficient is still a question.
A.What
B.Which
C.That
D.Whether
第7题
A、effective
B、rotten
C、efficient
D、profitable
第8题
Which of the following is NOT true?
A.Singapore has always been a highly efficient country in every way.
B.1%e campaigns are not always very effective in Singapore.
C.Singapore does its best to make its people more polite.
D.Not all the campaigns are launched every year.
第10题
A.For what?
B.Take it easy.
C.What on?
D.So what?
第11题
According to the passage, double-paned windows______.
A.are energy efficient
B.can only be used as replacement
C.are only used in new buildings
D.will lower your heating costs by 50%