Structure 2

No spectacle in the universe is ______ than an exploding star.

• impressive

• as impressive

• more impressive

• the most impressive

The Allegheny and Monongahela rivers ______ in Pittsburgh, Pennsylvania, to form the Ohio River.

• meet

• meeting

• for meeting

• which meet

The horns of a rhinoceros continue ______ throughout its entire lifetime.

• it grows

• to grow

• they grow

• grow

Mathematics helps meteorologists to predict the weather more accurately, to calculate the speed of storms, and ______.

• for the wind to blow determines

• causes the wind blowing to determine

• to determine what causes the wind to blow

• determine the wind's blowing

________ position of the planet Earth in relation to the Sun is always changing a little bit.

• The

• That the

• It was the

• There was a

Systems of phonetic writing are ______ at transcribing accurately any sequence of speech sounds.

• the aim

• aimed

• who aims

• by aiming

In photosynthesis, ______ through which green plants manufacture food, energy from direct sunlight is trapped by a substance called chlorophyll.

• that the process

• is a process

• the process

• in which the process

______ and hard, ivory may be carved with great delicacy into intricate patterns.

• Because of its density

• Because it is dense

• May be dense

• Its density

A solar eclipse occurs when the Moon is between the Sun and the Earth, _____ shadow of the Moon moves across the face of the Earth.

• and the

• and it is the

• that the

• that it is the

The spectacularly beautiful and sultry voice of Lena Home made her ________.

• being a nationally celebrated vocalist

• a vocalist was nationally celebrated

• as nationally celebrated vocalist

• a nationally celebrated vocalist