There are_______ seasons in a year． Winter is_________season．

If it ____ tomorrow, we will have a picnic in the park.

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

By the way, how many of us can attend the meeting? —The number of the students to attend the meeting _____ fifty.

How long does it take to get to the airport?—Forty minutes. But it’s foggy today. I’m not sure the highway will closes soon. Let’s set off earlier.