Wecan’timaginewhatgreatdifficultytheyhave

來源：國語幫 1.45W

We can’t imagine what great difficulty they have ________ the problems in the plan.

A．to settle B．settling

C．settled D．to be settled

解析：此句中 they have 為定語從句。what great difficulty 為先行詞，還原即為： have what great difficulty (in) settling ...，故選B項。