1. Since early times, people have been fascinated with the idea of life existing somewhere else besides earth.

Key Points: fascinate
(1). be fascinated by
Humans are always fascinated by rainbows.
(2). be fascinated to
I would be fascinated to hear your views on this problem.

2. This episode gave Doctor Myer her first clue to something every doctor learns sooner or later-most people just don’t listen very well.

Key Points: sooner…later
(1). no sooner…than…(two thing happen at the same time)
No sooner had I walked in the door than the phone rang.
(2). the sooner, the better
“When shall I finish the project?” “The sooner, the better.
(3). sooner rather than later
I’d like to see it done sooner rather than later.

3. We’ll send out the manuals this afternoon by express mail entirety at our cost, and the manuals should arrive tomorrow or the day after at the latest.

Key Points: cost
(1). at all cost(s)
This is your only choice. You have to win at all costs.
(2). at any cost
She decided to lose weight at any cost.
(3). at cost (at a basic price)
I will sell you this bag at cost.