We have different language courses; you can choose ________ if you like.

The second runway of Hong Kong International Airport was officially ____ on May 26,1990.

By the middle of the 21st century, the vastmajority of the world’s population _____ in cities rather than in the country.

There is______ “s” in the word “watches” and the underlined part is pronounced (发 音)as____.

It will be many years ______ the doctors and medical scientists can find _____ for cancer