问题
ime _____ siting at a desk, office clerks are generally troubled by various health problems.
A:being spent
B:having spent
C:spending
D:spent;
B:having spent
C:spending
D:spent;
正确答案是：
同类题型
If you can’t _____a better plan, we have to carry out the present one. [ ]
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ou visit the museum today—No. We _____ it, but we spent too much time shopping.