Nhận biết (M1)

A young bullfrog develops in clear stages. First, it is a small tadpole that uses its tail to swim in ponds. Next, it grows into a large tadpole. Then, tiny back legs begin to appear, and after several weeks, front legs push through the skin. __________ its tail shrinks away completely as the tadpole becomes an adult frog ready for life on land.

Which choice completes the text with the most logical transition?

• A.

  First of all,

• B.

  Finally,

• C.

  Instead,

• D.

  For instance,