He found _____ not easy to learn a foreign language well.
The girl was so ____ by the mighty river that she would spend hours sitting on its bank and gazing at the boats and rafts going and coming.
-These peaches really juicy.-They ____ be! Just see the price, $3,99 a pound. Very expensive, aren’t they!
When realizing they would be ___ of traffic jams or air pollution more people will choose public transportation.
Keep it in mind not to disturb the president at two o’clock this afternoon, when he ____ a global joint meeting.
After months of a hard voyage on the rough sea, they finally came to _____they called their “promised land”.