Do you know about the scientist Tu Youyou？
Yes，she won the 2015 Nobel Prize in medicine because of her great ．（ ）
A．surpriseB．achievement
C．educationD．satisfaction
As we all know，the telephone ________ by Alexander Graham Bell in 1876.（ ）
| A． |
invented |
B． |
is invented |
| C． |
was invented |
D． |
Jimmy wants to _______ his trip because he is too busy with his studies.（ ）
| A． |
put off |
B． |
wait for |
| C． |
prepare for |
D． |
In order to protect the environment，many people choose to go to work _____ subway.（ ）
| A． |
in |
B． |
on |
C． |
by |
Jason will go to visit his grandparents ________ he finishes his work this weekend.（ ）
| A． |
unless |
B． |
though |
C． |
if |
Today is Frank's twelfth birthday.His mother bought a nice present for ______ .（ ）
| A． |
her |
B． |
him |
C． |
them |