题文
. There is such an occasion ___________ we know lots of words, but we can’t choose a suitable one to express ourselves.
| A．where | B．when | C．which | D．what |
推荐试卷
. There is such an occasion ___________ we know lots of words, but we can’t choose a suitable one to express ourselves.
| A．where | B．when | C．which | D．what |
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