问题
选择题
| Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it. |
| A. to see B. to be seen C. seeing D. seen |
答案
答案：B
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| Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it. |
| A. to see B. to be seen C. seeing D. seen |
答案：B