Nothing is so easy as _____ parents to raise their expectations of their children too high.
A. of B. to C. by D. for
The air quality in the city, ______ is shown in the report, has improved over the past two months.
A. that B. it C. as D. what
Letterboxes are much more in the UK than in the US, where most people have a mailbox instead.
A．common B．normal C．ordinary D．usual
When different cultures, we often pay attention only to the differences without noticing the many similarities.
A．compared B．being compared
C．comparing D．having compared
is our belief that improvements in health care will lead to a stronger, more prosperous economy.
A．As B．That C．This D．It
We won’t keep winning games we keep playing well.
A．because B．unless C．when D．while
