–It’s thirty years since we last met. -But I still remember the story, believe it or not, we got lost on a rainy night.
Can you tell me ________ get to the chemistry lab ?
The teacher told the students ________ so much noise.
I feel it a great honor _________ to give a speech to you.
The government is ___ everyone to save water.
I couldn’t help________ the computer because I was not free at that time.