John smith________ a letter to his mother yesterday.a、wrote b、 had wrotec、 was written d、 writes

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John smith________ a letter to his mother yesterday.a、wrote b、 had wrotec、 was written d、 writes
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John smith________ a letter to his mother yesterday.a、wrote b、 had wrotec、 was written d、 writes
John smith________ a letter to his mother yesterday.
a、wrote
b、 had wrote
c、 was written
d、 writes

John smith________ a letter to his mother yesterday.a、wrote b、 had wrotec、 was written d、 writes
a 因为有时间状语yesterday,应该是一般过去时,去bd;而且此句为主动,不需要被动形式,所以去 c.