PM2.5是指空气中直径小于或等于2.5微米的颗粒物,它负载的大量有害物质能直接进入人体肺部,甚至渗入血液,诱发多种疾病。从2012年起,北京、天津等地环保部门率先开展PM2.5监测,并把监测数据向市民公布。这一做法表明
—Could you tell me how your father usually goes to work? —Yes. If it is fine, he ________ to his office.
—Mike, do you know who wanted me on the phone? —Sorry. I don’t know. I ________ a bath in the bathroom.
As time ________ on, Sally began to wonder if Bruce ________ Bilks’new poem called Tabled’Hute.
I wonder why Jenny ________ us recently. We should have heard from her by now.
I ________ ping-pong quite well, but I haven’t had time to play since the new year.