You can't catch the charm of English poetry ___you understand its rhythm．
A．if B．unless C．though D．while
The word "breakthrough" is often used when talking about the newest drug or the next treatment ___ in cancer research．
A．finding B．being found C．to be found D．found
October 24, 1860, the Qing government and the Britain sighed "the treaty ofBeijing", ___ put an end to the second Opium war．
A．which B．that C．when D．in which
___ the invention of the steam engine, the industrial revolution played a vital role in human history．
A．Originating in B．Originated in
C．To originate in D．Being originated in
Blog, a shared on line journal where people can post diary entries about their personal experience and
hobbies, ___ more and more popular with people of all ages．
A．becomes B．become
C．becoming D．is becoming
My car's performance is ___ since the engine's been tuned and the tires have been changed．
A．better as twice B．twice as the condition
C．twice as good D．twice as better
