急,

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急,急, 急,Has...been            (题目有错误

急,
急,
 

急,
Has ...been            (题目有错误,原题应为:Tom  has  been .)
They felt too tired to walk so fast

1.Has,been
2.They felt so tired that they couldn't walk so fast.

Have had

1有问题,需把have---has
Has ....been
2. They felt so tired that they couldn't walk fast./ They felt too tired to walk fast.