Choose the answer among A, B, C, D to complete each of the sentences below:
The novel is based on his ________ in the war.
A.attitudes
B.images
C.experiences
D.situations

Choose the answer among A, B, C, D to complete each of the sentences below:
I'm ________ a surprise party for my sister.
A.providing
B.organizing
C.taking
D.serving

Choose the answer among A, B, C, D to complete each of the sentences below:
The girl was so ________ that she didn't look at him in the face.
A.impatient
B.shy
C.sneaky
D.confident

Choose the answer among A, B, C, D to complete each of the sentences below:
The Great Wall of China is considered one of the greatest wonders in the world ______ its magnificence and significance.
A.because
B.instead of
C.thanks to
D.in spite of

Choose the answer among A, B, C, D to complete each of the sentences below:
Scientists say that the main reason ______ population explosion is an increase in birth rates.
A.in
B.to
C.for
D.of

Choose the answer among A, B, C, D to complete each of the sentences below:
Jen had confided her secret to Mark; but he betrayed her ________.
A.sympathy
B.loyalty
C.constancy
D.trust

Choose the answer among A, B, C, D to complete each of the sentences below:
She frequently volunteers ______ extra work because she really likes her job.
A.for
B.to
C.in
D.with

Choose the answer among A, B, C, D to complete each of the sentences below:
Many university students _______ spent their summer vacations teaching illiterate people to read and write.
A.consciously
B.freely
C.gradually
D.voluntarily

Choose the answer among A, B, C, D to complete each of the sentences below:
The 27-year-old Soviet cosmonaut became the first person to eat and drink in ______.
A.weight
B.weightlessness
C.weightless
D.weighting

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