She__________ Robert for ten years.
--What do you think of his talk on Information Technology? --Oh, excellent. It’s worth ________.
Although the Eiffel Tower ______ to last for 20 years, it is still standing today.
He didn’t put the things ____ they belonged, for _____ he got his punishment.
When he was there, he ______ go to that coffee shop at the corner after work every day.
With the mid-term examination approaching, students should ______ to stay energetic.