We arrive ________ the Baiyun Airport five minutes late.
—How many teachers are there in your school? —About two _________.
— Could you look after my pet dog for me while I am away? — _______.
— What’s your plan for this weekend? — We will go for a picnic by the river _______ it rains.
—Why was he late for school yesterday? — He overslept. By the time he got to the bus stop, the bus ________ already ______.
—Heavy smog (雾霾 )in eastern and central China seems to get more and more serious. —I agree. Something to deal with it.