A.conference 
B. lecturer      
C.reference  
D.researcher

The word "attributes" in paragraph 1 most likely means ________.
A.qualities                     
B.aspects                       
C.fields         
D.skills

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
_______, one tin will last for at least six weeks.
A.Using economical
B.Used economically
C.Used economical
D.Using economically

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Sandra hated _______ though she didn’t say a word.
A.photographing
B.to being photographed
C.being photographed
D.being photograph

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
It is claimed that new nuclear power plants _______ to be safer than the current ones are soon built.
A.to design
B.designing
C.designed
D.are designed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Duy Hieu won the gold medal at the National Examination. His parents___very proud of him.
A.could have been
B.can’t have
C.can’t be
D.must have been

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
________ becoming extinct is of great concern to zoologists. 
A.That giant pandas are
B.Giant pandas are
C.Are giant pandas
D.Giant panda is

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Solar energy is not widely used ______ it is friendly to the environment.
A.since
B.although
C.in spite of 
D.because of

You look so tired! You _______out too late last night.
A.must have been
B.had been
C.had to be 
D.should have been

While Peter ________the rose bush in the back yard, the phone rang.
A.were watering
B.has watered
C.watered              
D.was watering