He is so a good student that he can do all the exercises easily.
A.so
B.can
C.the exercises
D.easily

The students about who I told you like football very much.
A.about
B.who
C.like
D.very much

The car was too expensive for me to buy.
A.The car was so expensive that I could buy it.
B.The car was not expensive enough for me to buy.
C.The car was such expensive that I couldn’t buy it.
D.It was such an expensive car that I couldn’t buy it.

Mary and Jane like these stories because they are very interesting.
A.Mary and Jane, who are very interesting, like these stories.
B.Mary and Jane like these stories, which are very interesting.
C.Mary and Jane like these stories, which they are very interesting
D.Mary and Jane like these stories, that are very interesting.

If I were you, __________________.
A.I will help that old woman
B.I would help that old woman
C.I would have helped that old woman
D.I help that old woman

How much does an adult elephant eat a day?
A.About 19,000 kg of grasses leaves and other plants.
B.About 150 kg of grasses leaves and other plants.
C.About 331 kg of grasses leaves and other plants.
D.About 30,400 kg of grasses leaves and other plants.

How many African elephants are there today?
A.19
B.30,4
C.55
D.550

_______(46)
A.will love
B.is loving
C.loves
D.has loved

_____(47)
A.which
B.when
C.what
D.where

_____(49)
A.whether
B.if
C.or
D.so