单项选择题

Major delays affected all flights to Darwin yesterday ______ there was a security alert at the airport there.

A．however
B．despite
C．because
D．therefore
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单项选择题
The management team ______ decided to introduce an incentive plan to encourage the employees to work harder.
A．intent
B．intention
C．intentional
D．intentionally
单项选择题
The fee for the training camp ______ all seminars and workshops during the week.
A．wraps
B．covers
C．guards
D．spreads
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