問題詳情:
Your son has kept _________ for two hours. You’d better ask him to have a rest.
A. study B. studied C. to study D. studying
【回答】
D
知識點:動詞和動詞短語
題型:選擇題
問題詳情:
Your son has kept _________ for two hours. You’d better ask him to have a rest.
A. study B. studied C. to study D. studying
【回答】
D
知識點:動詞和動詞短語
題型:選擇題