问题

See the flags on the building? That was _____we did this morning.[ ]
A: When
B: which
C: Where
D: what
B: which
C: Where
D: what
正确答案是:
同类题型
Could you do _____ for me, please—— Yes, with pleasure.
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The Xuanwu Lake looks very beautiful many trees around it.
______ me a chance to try, I believe, I won’t disappoint you.
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