Let's put an O ________often.( )A.at B.for C.with 答案:【答案】B【解析】句意:让我们用“O”表示经常。A钟点前加at,B.为了,C.和,故选B。
写出下列词的复数形式。
1. a girl 2. a ball 3. an orange 4. a day 5. a hamburger6. a pen
three __________________many __________________four __________________five __________________eight __________________two __________________