—I hear your brother will enter Tsinghua University this summer.
—Exactly，he was a born genius.He was able to read and write ________ the age of 4.（ ）
A．inB．onC．atD．of
Remember _______ some fruit when you come back．（ ）
A．buyingB．to buyC．buy
_______do you watch TV？
Twice a week．（ ）
A．How oftenB．How longC．How soon
Where is Jim？
Look! He _______ under the tree．（ ）
A．is standingB．stood
C．stands
My daughter is years old． Today is her birthday．（ ）
A．nine； ninethB．nine； ninth
C．ninth； nine
Is this your English book？
No， it's my brother's． is over there．（ ）
A．MineB．MyC．Me