单项选择题

Despite these difficulties it is essential that the therapist ______ to incorporate preventive measures in his treatment.

A. tries
B. tried
C. try
D. trying
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单项选择题
A Thai girl was their maid, and she greeted them with a curtsy, took their cases up to their rooms and ______ them with cool drinks.
A. furnished
B. equipped
C. received
D. offered
单项选择题
It is often ______ that winter is the most suitable time for training yet only 43% indicated that any time during winter would be suitable.
A. assured
B. reassured
C. ensured
D. assumed
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