He started to learn English in 1990 and in the years ________ he kept on using it in his work.
—You may find the key to the maths problem on page 107. —Ah, it’s so simple. I wonder why I _of that.
The long and tiring talk, filled with arguments and quarrels, ended in disorder, _________ no agreement at all.
Many people in the city wonder _____the city officials have the information they need to solve the problem.
So difficult _____ it to adjust to an English-speaking environment that he determined to learn English hard.
—It’s a lovely day, isn’t it?—Yes. I love ______ when the weather is like this. Why don’t we sit outside and have our lunch?