_____ we continue to kill elephants for their ivory，we humans will lose them in the end．（ ）
| A． |
If |
B． |
Before |
C． |
Until |
D． |
Although |
Which is your new English teacher？
The young lady red over there．（ ）
A．withB．inC．onD．for
My father gave me a bike on my birthday．（ ）
A．tenB．a tenthC．the tenthD．tenth
Look!There is bottle on the table．（ ）
A．aB．anC．theD．/
Could you please take out the rubbish？
_______．But I want to drink a cup of water first．（ ）
A．Thank youB．Sure，no problem
C．You're welcomeD．No，I can't
Do you know ____ to our school？
Next term．（ ）
A．when the exchange students came
B．when did the exchange students come
C．when the exchange students will come
D．when will the exchange students come