Doing eye exercises is good ______our eyes．（ ）
| A． |
at |
B． |
to |
C． |
for |
D． |
with |
China successfully hosted the Belt and Road Forum_________May，2017．（ ）
| A． |
on |
B． |
in |
C． |
by |
Jack is such__________friendly boy．He gets along well with his classmates．（ ）
| A． |
a |
B． |
an |
C． |
the |
﹣Mr．Black，could you tell me ______？
﹣At 10：00 tomorrow morning（ ）
| A． |
where we'll go hiking |
| B． |
when we'll have a meeting |
| C． |
whether you'll come to my birthday party |
﹣I hear Susan will go to Beijing by herself．
﹣That's true．_______ her father _________ her mother will go with her．（ ）
| A． |
Both；and |
B． |
Either；or |
C． |
Neither；nor |
﹣When is the 31 stOlympic Games？
﹣It ________ in Rio do Janciro of Brazil in August，2016．（ ）
| A． |
held |
B． |
is held |
C． |
will be held |