With our knowledge ________ practice，we can make great contributions to our society.

26．—You look quite tired.—I __________ the project here in order to meet the deadline

What about the party —–Oh, Miss Liu was unhappy , She went out without ______ a word.

Do you often talk with people from English-speaking countries—Sadly , I ______ ever speak to English people.

There is little time left, so the chairman asked me to _____my speech to 20 minutes.