He tried his best to solve the problem, _______difficult it was.A. however B. no matterC. whatever D although
____ was known to all, John had broken his promise ___ he would stay with us for some time .
The Wenchuan earthquake in 2008 is believed ____more than 70,000 people and made thousands homeless, _____it perhaps the most destroying tsunami in history.
Berners-lee made ____possible for everyone to use the Internet.
They’ve _______ a lot of high-rise buildings recently.
Would you like _____me?