Many Hope Primary schools ______ last year．（ ）
A．is builtB．was builtC．were built
Our eyesight will become poorer and poorer ______ we keep playing with phones．（ ）
| A． |
though |
B． |
unless |
C． |
if |
Johnny made up his mind to give up smoking． He is thinking about ____．（ ）
| A． |
how he can make it |
| B． |
how can he make it |
| C． |
how will he make it |
"Yan Ning is one of 25 foreign associates（院士）in the US National Academy of Sciences．"
"____ excellent she is!"（ ）
| A． |
What an |
B． |
What |
C． |
How |
There are 24 solar terms in a year． Grain Rain often starts in April， the ____ month of the year．（ ）
| A． |
third |
B． |
fourth |
C． |
fifth |
Today， all the erhu masters play and praise Erquan Yingyue． It ____ one of China's national treasures．（ ）
| A． |
becomes |
B． |
became |
C． |
has become |