题文
They often have problems with______.
| A．what will they be able to do | B．what they will be able to do |
| C．that will they have to do | D．that will they have to do |
They often have problems with______.
| A．what will they be able to do | B．what they will be able to do |
| C．that will they have to do | D．that will they have to do |
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