-How many letters you to your mother？
-109 in all， since 2016．（ ）
| A． |
has， written |
B． |
have， written |
| C． |
did， write |
D． |
are， writing |
一Why do you choose to use Beidou Navigation （导航） Satellite System，Mr.Li？
一Because I think it has many advantages GPS （全球卫星定位系统）.（ ）
A．onB．inC．overD．of
—Sir，I have trouble doing the voluntary work for the 20th Games of Jiangsu Province in Taizhou.
一Don't worry.A lot of support soon.（ ）
A．is offeredB．will be offered
C．was offeredD．were offered
It's reported that， ，people with college education can make more money than those without.（ ）
A．in generalB．in publicC．in timeD．in all
一I often see the sign in schools.What does it mean？
一Students bring mobile phones to school.（ ）
A．needn'tB．can'tC．couldn'tD．wouldn't
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