单项选择题

(Even though) Sedat (has been studying) English for three years before came to (the United States), it is still difficult for him (to express himself).

A．Even though
B．has been studying
C．the United States
D．to express himself
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A．Find answers
B．to
C．is
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He (jumped) (over) the fence, ran (across) the field, and (disappearing) into the woods.
A．jumped
B．over
C．across
D．disappearing
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