Is your WeChat account （账户） safe？
Yes， even my father can't use it __________ I tell him the password．（ ）
A．whenB．unlessC．whileD．if
﹣Labor（劳动）education is important for students' development．
﹣Yes． schools put it into practice， students will be more independent and helpful． （ ）
| A． |
While |
B． |
Unless |
C． |
If |
﹣Look! People outside are wearing thick coats．
﹣The weather be very cold． （ ）
| A． |
might |
B． |
must |
C． |
can't |
Taking High School Entrance Examination one month later than usual will be _____unforgettable event for us． （ ）
| A． |
a |
B． |
an |
C． |
the |
Welcome back to school， Tim． I want to know online．
Of course， Ms． Clark， I was hard﹣working． （ ）
| A． |
what you studied |
B． |
when you studied |
C． |
if you studied hard |
Why do many farmers put their products online these days？
them more easily． （ ）
A．To sellB．SellC．Selling