题目内容
动词时态填空
We don't know what ________（do）.
特殊疑问句＋
(用括号内所给动词的适当时态填空) We can help by ________ (make) a donation or doing some voluntary work.
We don't know what ________(do)．
We don't know how ________(get)to the post office．
We don't know how ________ （get） to the post office.
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