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 |
﹣_____﹣It's a pleasure．（ ）
| A． |
Don't worry about the task． |
| B． |
Thank you for showing me around． |
| C． |
Be careful when you travel． |
| D． |
You' d better go to the dentist's now． |
Vivian will take her daughter to the amusement park_____she gets the tickets．（ ）
| A． |
if |
B． |
until |
C． |
although |
D． |
unless |
Which club do you prefer to join，the chess club_____the dancing club？（ ）
| A． |
so |
B． |
but |
C． |
or |
D． |
for |
﹣Tom，_____here to carry the luggage upstairs for me，will you？ ﹣All right．（ ）
| A． |
come |
B． |
came |
C． |
coming |
D． |
to come |
According to the traffic law，children under 12_____ride bicycles on the road．（ ）
| A． |
won't |
B． |
wouldn't |
C． |
needn't |
D． |
mustn't |