问题补充：
He with his parents to Shanghai once a year.
A. go
B. are going
C. goes
D. is going
答案：
A. go
B. are going
(答案→)C. goes
D. is going
解析：他每年和父母去一次上海。句中with his parents为伴随状语，实际主语为he，故谓语动词用单数，结合时间状语可知句中为一般现在时态，故选C。
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