Five words that contain GH as a letter-pair have had all of their other letters removed and placed into a pool. Put those letters back in their proper places. What are the words?

GH---, -GH---, ---GH-, ----GH, ---GH--

Pool: A, A, E, I, M, O, O, O, R, R, S, S, S, T, T, T, T, U, U, W

Each of the following clues describes two words. One of the words is a type of tree. The other word is that tree with one of the following changes: a letter added anywhere (pine spine), a letter deleted anywhere (larch arch), a letter changed anywhere (birch birth). There is no rearrangement of the other letters. No tree is used more than once.

1) This is an older tree.
2) This is a well-known tree.
3) This is a feeble tree.
...

Which country in Group B can be added to Group A? Why? It has nothing to do with spelling or pronunciation.

Group A: Argentina, Dominican Republic, Ethiopia, Malaysia
Group B: Cambodia, France, Greece, Norway, Portugal, Somalia

I am a fake stone,
I am green without envy.
I am three in one,
I can symbolize the Trinity.

What am I?

Jacob's class picture has 40 photos arranged in a 8 x 5 grid. The photos in the top row are numbered 1 through 8 from left to right, with the photos in the remaining rows similarly numbered (as shown below). Given the following clues (bordering includes horizontal, vertical, and diagonal), where is Jacob's picture?

X X X X X X X X (1 - 8)
X X X X X X X X (9 - 16)
X X X X X X X X (17 - 24)
X X X X X X X X (25 - 32)
X X ...

What is the meaning of this rebus?

Buse, train derailment!
Emic, head-on collision!
Larm!
Oint, apartment on fire!
Rena, bank robbery in progress!