Choose the answer among A, B, C, D to complete each of the sentences below:
Children are always ______ about Tet holiday.
A.concerned
B.keen
C.interested
D.excited

Choose the answer among A, B, C, D to complete each of the sentences below:
Better health care and agriculture have led to rapid population _______.
A.grow
B.grown
C.growth
D.growing

Choose the answer among A, B, C, D to complete each of the sentences below:
I hate camping because I can't ______ an umbrella tent in the wind and I can't make a fire in the rain.
A.set off
B.turn round
C.put up
D.take over

Choose the answer among A, B, C, D to complete each of the sentences below:
The Great Wall is China's most popular ______.
A.impression
B.attraction
C.construction
D.contribution

Choose the answer among A, B, C, D to complete each of the sentences below:
They started a campaign to...... smoking among teenagers.
A.decrease
B.encourage
C.discourage
D.prohibit

Choose the answer among A, B, C, D to complete each of the sentences below:
The campaign will hopefully ensure the survival ______ the tiger.
A.of
B.to
C.on
D.for

Choose the answer among A, B, C, D to complete each of the sentences below:
My parents lent me the money. _____, I couldn't have afforded the trip.
A.Only if
B.However
C.Therefore
D.Otherwise

Choose the answer among A, B, C, D to complete each of the sentences below:
______ energy sources include water and wind power.
A.Environmental friendly
B.Environmentally friendly
C.Friendly environmental
D.Friendly environment

Choose the answer among A, B, C, D to complete each of the sentences below:
The health of our children is being ______ by exhaust fumes.
A.dangerous
B.danger
C.endangered
D.endanger

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Many efforts have been made to protect ________ animals.
A.dangerous
B.endanger
C.in danger
D.endangered