问题
选择题
His mother could do nothing but _______ for the doctor to arrive.
A．to wait
B．waiting
C．waited
D．wait
答案
答案：D
考查非谓语动词。do nothing but (to) do除了……. 别无选择，根据含义选择D。
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His mother could do nothing but _______ for the doctor to arrive.
A．to wait
B．waiting
C．waited
D．wait
答案：D
考查非谓语动词。do nothing but (to) do除了……. 别无选择，根据含义选择D。