He didn't expect that his parents could manage to know ________ is going on in his college life on the Internet.

---Miss Li, where did you visit last week?--- I visited a big company __________ ships are made.

Have you seen the film “Titanic”,  ____ leading actor is world famous? 

Sometimes, ___ we show our gratitude for a person is reflected in the kind of food we serve him or her．

—What do you think of it?—Well，it’s worth doing ________ the result is satisfactory.