Why were you so late this morning? —I _____ in heavy traffic for an hour on the way here

This movie is referred to ______ amasterpiece of the famous director.

ou read the book, you’d better make a mark_____ you have any questions

I______ for Hong Kong on SaturdayWill you go to see me off at the airport？

If nature does not provide man with the necessary material, it is the laboratory ____ he will turn to for it．