问题

I’ll never forget the most wonderful holiday ________ we stayed in the country with my grandparents.
A:when
B:which
C:where
D:that
B:which
C:where
D:that
正确答案是:
同类题型
You can’t work out this problem ___in this way.
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We needn’t have worried. Everything ______ all right in the end.
Why do you look unhappy, Lucy— I can’t learn math well I always work hard.