Can some one help me with at least one question....Shifts in Tense

1.Which sentence contains an inappropriate shift in tense?
A.
As soon as the alarm clock rings, Neal is eager to get out of bed.
B.
Antoine brushed his teeth before he eats his breakfast.
C.
Often the baby stands in the crib and holds onto the rail.

2. Which sentence contains an inappropriate shift in tense?
A.
He ate his entire dinner, but his stomach is still growling loudly.
B.
We are reading these books, which we got from the library yesterday.
C.
The dog is playing in the yard as Mrs. Smith worked in the garden.

3.Which sentence contains an inappropriate shift in tense?
A.
Although few people view Marta's blog, she writes an entry every day.
B.
As Dana was reading a magazine, I use the computer.
C.
The performance will begin as soon as the theater becomes dark.

4.Which sentence contains an inappropriate shift in tense?
A.
I will have been cooking for the entire morning when the guests will arrive.
B.
When Grandpa calls on the phone, he will tell us the big news.
C.
Before this week ends, the broken light fixture will have been repaired.

5.Which sentence contains an inappropriate shift in tense?
A.
Has Jack showed you his photos yet, or is he still telling that funny story?
B.
While Lucy was hiking on the trail, she trips over a tree root and twists her ankle.
C.
After I dry these dishes, shall I put them away?

6.Which word group best completes the sentence without introducing an inappropriate shift in tense?
"While I was cleaning the bathroom,"
A.
I somehow misplaced my toothbrush.
B.
I somehow misplace my toothbrush.
C.
I somehow had been misplacing my toothbrush.

D.
I somehow was misplacing my toothbrush.

7.Which word group best completes the sentence without introducing an inappropriate shift in tense?
"The audience left before"
A.
the movie will be ending.
B.
the movie ended.
C.
the movie ends.
D.
the movie will end.

8.Which word group best completes the sentence without introducing an inappropriate shift in tense?
"As the adults cleaned up"
A.
the children will play with their toys.
B.
the children play with their toys.
C.
the children are playing with their toys.
D.
the children played with their toys.
9.Which word group best completes the sentence without introducing an inappropriate shift in tense?
"Snow had fallen on the ground overnight,"
A.
so we will have gotten our shovels to clear the driveway.
B.
so we will get our shovels to clear the driveway.
C.
so we got our shovels to clear the driveway.
D.
so we get our shovels to clear the driveway.

10.Which word group best completes the sentence without introducing an inappropriate shift in tense?
"We had been putting away the dishes"
A.
when the guests are arriving.
B.
when the guests arrive.
C.
when the guests arrived.
D.
when the guests will arrive.

Is the group of words a sentence or a run-on sentence? The sand at the beach is hot it hurts to walk across it.
A.
sentence
B.
run-on

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During world war 11, William Golding was involved in? 1. The battle of the bulge
2. The attack on Pearl Harbor
3. The Liberation of Berlin
4. The sinking of the Bismarck

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Find missing exponent (b^2 = b^-6