严防校车安全事故,除了各级政府、社会各界的共同努力外,我们青少年应该( )①增强安全意识,遵守乘车规则 ②参加安全演练,提高自护能力 ③拒乘机动车辆,步行上学下学 ④发现非法营运校车,及时举报
---Could I clean the bedroom for you? ---No, thanks. I _______ it myself.
-Have you read this book? -Yes.I _______ it two weeks ago.
Sixteen-years-olds shouldn’t ______ to go to an Internet bar.
—Hi,Jack! Where_________ you ______ these days? —I _________ Beijing for about 2 weeks.
There______ a basketball match tomorrow morning.