问题: Having a trip abroad is certainly good for the old couple,but is remains--whether they will enjoy it
A to see B to be seen C seeing D seen
please explain it to me thanks
解答:
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
remain to be +v+ed尚需，有待，尚未：
The question remains to be solved.问题有待今后解决．
选b,remain前 的is 应该是it ．
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