John had never been abroad before, ________ he found the business trip very exciting.

Frequently single-parent children ____some of the functions that the absent adult in the house would have served.

For most people, it takes _______ effort to memorize a long poem.

Football is _________ the most popular sport of the world.

Food and ________ are very important to us all.

Every possible test ______ to decide the nature of her illness.

Eventually最后, they gave up the project to build a bridge over the river because of the _______ high costs it would involve.

Henry and Bady _____to the parties at the Trade Union every Saturday.

I used to _____TV on weekends, but now I start to do some sports with my friends.

“Do you like being married?”“Yes, but I＇m not used _______ every night.”

- Does he speak English or Russian? - He doesn＇t speak_________.