Please ______ all the lights when you leave the classroom．（ ）
| A． |
turn on |
B． |
turn off |
C． |
turn down |
D． |
turn up |
﹣Do you know the Color Run，a five﹣kilometer race？
﹣Yes．So far it______into quite a few cities in our country．（ ）
| A． |
comes |
B． |
came |
C． |
has come |
The scientist has failed in the test many times，______he never gives up．（ ）
| A． |
but |
B． |
so |
C． |
or |
﹣Joan has made great progress in speaking Chinese．
﹣She_________works hard at it，you know．（ ）
| A． |
never |
B． |
seldom |
C． |
always |
﹣Our English teacher will work for 2017 BRICS Summit （金砖峰会）this September．
﹣Great!I am so proud of_____．（ ）
| A． |
she |
B． |
her |
C． |
hers |
China successfully hosted the Belt and Road Forum_________May，2017．（ ）
| A． |
on |
B． |
in |
C． |
by |