When you are on the bus to work in the morning, smile to the people sitting beside you, you will get his smile ______.
The air quality in the city, ______ is shown in the report, has improved over the past two months.
Letterboxes are much more in the UK than in the US, where most people have a mailbox instead.
When different cultures, we often pay attention only to the differences without noticing the many similarities.
is our belief that improvements in health care will lead to a stronger, more prosperous economy.
We won’t keep winning games we keep playing well.