----Is it the first time you _______ Beijing?----No. But the first time I ______ here, the city wasn’t so beautiful.

We can see no clouds in the sky. Therefore, there’s no doubt ______ it will be fine tomorrow.

My brother got fired a month ago, but he landed on his feet and found another job that paid ____ money. 

Now parents feel they can’t help______reading stories suitable for their children, so sometimes they can’t help but______ to experts for advice.

 Modern science has given ____clear evidence ____ smoking can lead to many diseases ____ it’s time for us to take measures.