— _________ has Liu Xiang taken part in world’s competitions of 110-metre hurdles?— I’ve no idea. Let’s find it out on the Internet.

 If you want to know the meaning of the word______, you’d better look it up in the dictionary.

What TV shows do you like         , talk shows or talent shows?

The 3-month-old baby cried from time to time last night. His parents     had a good sleep.

Bob is good at all the subjects at school,               science.