Daqing is in ________ north of China and it has ________ population of more than 2.7 million.（ ）
| A． |
a；a |
B． |
a；the |
C． |
the；a |
D． |
the；the |
The _____of the 2019 Beijing International Horticultural Expo（园艺博览会） is "Live Green，Live Better"．（ ）
| A． |
symbol |
B． |
condition |
C． |
theme |
D． |
invention |
Yunnan Museum is such an interesting place that many kids have fun _____ it．（ ）
| A． |
visiting |
B． |
to visit |
C． |
reading |
D． |
to read |
You looked unhappy just now．_____？
I missed the school bus and arrived late for class．（ ）
| A． |
What did you eat for lunch |
| B． |
How was your picnic |
| C． |
What happened to you |
| D． |
How did you go there |
The PLA Navy（中国人民解放军海军） has been greatly helping keep world peace．As a Chinese， I am_____ it．（ ）
| A． |
responsible for |
B． |
proud of |
| C． |
full of |
D． |
known for |
With the rapid progress in high technology， 5G_____ around most parts of China in the near future．（ ）
| A． |
is used |
B． |
is using |
| C． |
will use |
D． |
will be used |