правильно вставить слово
We had a voyage around. Mediterranean Sea last summer
(A, the)

We had a voyage around the Mediterranean Sea last summer.

Объяснение:

The ставится перед именами собственными, а – перед неопределёнными.

We had a voyage around THE Mediterranean Sea last summer

если тут надо составить предложения по типу, то так:   1) she will be able to walk in 6 mounts.

2) she will be able to talk in 2.5 years

3) she'll be able to tell stories in 4 years 

4) she'll be able to write letters in 5 years

  5) she'll be able to read in 3 years

6) she'll be able to do sums in 6.5 years