When asked about the company's future, the director ________ that he remained optimistic.
A ． responded B ． mastered C ． composed D ． performed
She mentally ________ herself top marks for staying cool under pressure.
A ． appreciated B ． awarded C ． advocated D ． admired
Singers performing Mozart's operas often dress in historical ________.
A ． costumes B ． customs C ． components D ． comments
This is a highly ________ task, and we must find someone capable to take charge of it.
A ． concerned B ． curious C ． confirmed D ． complex
There is currently no effective vaccine ________ malaria.
A ． against B ． in C ． with D ． of
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