【单选题】I spent in doing my homework yesterday.
【单选题】I usually______ have an hour with my son doing exercise every morning
【简答题】用所给动词的适当形式填空。 1. Listen! Some of the girls ______ (talk) about Harry Potter. 2. - Where is Mr. Green now? I haven't seen him for a few days. -He ______ (go) to Hong Kong. 3. You'd better ______ (not e...
【单选题】I spent half an hour ___________ my homework.
【简答题】I spent _ hour doing my homework.(a/an)
【单选题】I spent half an hour _________ my homework.
【单选题】I spent ______hour and ____half doing homework.
【单选题】下列化合物进行SN2反应相对活性最大的是