State whether the following sentence is always true, always false or ambiguous. Justify your answer.
February has only $28$ days.

Q. State whether the following sentence is always true, always false or ambiguous. Justify your answer.
Makarasankranthi falls on a Friday.

Q. State whether the following sentences are always true, always false or ambiguous. Justify your answer.
There are $27$ days in a month.

Q. State whether the following sentence is always true, always false or ambiguous. Justify your answer.
Dogs can fly.

Q. State whether the following sentences are always true, false or ambiguous. Justify your answer.
The earth is the only planet where life exist.

Q. State whether the following sentence is always true, always false or ambiguous.
The temperature in Hyderabad is $2^o$C.