Thunderware.

Family
Resist
Beginner
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Education

If they're square it's possible for the cover to slip down the hole (diagonally). A round manhole cannot fall down no matter which way it is rotated because it's width in any direction is greater than the opening on the hole.

Short (you just add 'er')

You are in second place.

The tree had two apples so when one fell in the storm the tree and ground both had just one apple. So neither had apples just an apple.

Starting.
starting, staring, string, sting, sing, sin, in, I.

DREAMT

A "One Way" sign!

The answer is either daughter or son-in-law, depending on whether the speaker is female or male.

Alphabet 'C'

10

1+1+1+1 = 4
1+2+1+2 = 6
1+3+1+3 = 8
1+4+1+4 = 10