He claimed that the train was "_______ full".
A. danger
B. endanger
C. dangerous
D. dangerously
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He asked the company _______ it was brave enough to publish his complaint.
A. that
B. if
C. to
D. which
The company was brave enough to _______ the customer's complaint.
A. reply
B. respond
C. respond to
D. imply
He travelled _______ North China _______ South China last month.
A. from...to...
B. in...in...
C. from...until...
D. to...to...
People find it very _______ if their complaints are just ignored.
A. annoy
B. annoying
C. annoyed
D. annoys
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